Episode TitlesThe ultimate reference on X-Files and Harsh Realm episode titles and related information.
The fourth column can have either previous titles or titles of movies or books, etc. whose names were the inspiration for the episode name. The former are in quotes; the latter are in italics. Foreign titles are just that: Some episodes had different names abroad. If the same name is put on consecutive episodes, that means the episodes are in the File or Dossier of that name. Those are the sets of videos sold abroad. Nicknames are what episodes were referred to by the crew. The same column can have alternate spellings for episode names, if the spellings are wrong or different, and also the meaning of initials in episode names are in that column. Finally, translations can be either of the official episode name or of previous titles. Titles are only given in columns 4 and on if they are different than the official title. Rumored but probably not true previous titles are marked with a "*".

X-Files Episodes
Production Number Original Air Date Episode Title Previous/Working Title(s), Movie/Book/etc. Title Foreign Title Novelization Title Nickname/Alt. Spelling/Initials Translation
Season 1 - 1X79 9/10/93 "Pilot"/Pilot     "X Marks the Spot"    
1X01 9/17/93 "Deep Throat"          
1X02 9/24/93 "Squeeze"          
1X03 10/1/93 "Conduit"          
1X04 10/8/93 "The Jersey Devil"          
1X05 10/22/93 "Shadows"     "Haunted"    
1X06 10/29/93 "Ghost in the Machine"          
1X07 11/5/93 "Ice"          
1X08 11/12/93 "Space"          
1X09 11/19/93 "Fallen Angel"          
1X10 12/10/93 "Eve" "The Girls from Greenwich"        
1X11 12/17/93 "Fire"          
1X12 1/7/94 "Beyond the Sea"          
1X13 1/21/94 "Genderbender"       "Gender Bender"  
1X14 2/4/94 "Lazarus"          
1X15 2/11/94 "Young at Heart"          
1X16 2/18/94 "E.B.E."       "Extraterrestrial Biological Entity"  
1X17 3/18/94 "Miracle Man"          
1X18 4/1/94 "Shapes"          
1X19 4/15/94 "Darkness Falls"          
1X20 4/22/94 "Tooms" "Squeeze II"        
1X21 4/29/94 "Born Again"          
1X22 5/6/94 "Roland"          
1X23 5/13/94 "The Erlenmeyer Flask"          
Season 2 - 2X01 9/16/94 "Little Green Men"          
2X02 9/23/94 "The Host" "Flukeman"        
2X03 9/30/94 "Blood"     "Fear"    
2X04 10/7/94 "Sleepless"          
2X05 10/14/94 "Duane Barry" 1   "Abduction"      
2X06 10/21/94 "Ascension" 2   "Abduction"      
2X07 11/4/94 "3"          
2X08 11/11/94 "One Breath"   "Abduction"      
2X09 11/18/94 "Firewalker"          
2X10 12/9/94 "Red Museum"          
2X11 12/16/94 "Excelsis Dei"     "Haunted" "Excelsius Dei" "Glory of God"
2X12 1/6/95 "Aubrey"          
2X13 1/13/95 "Irresistible" "Fascination"        
2X14 1/27/95 "Die Hand Die Verletzt"         "The Hand That Wounds"
2X15 2/3/95 "Fresh Bones"          
2X16 2/10/95 "Colony" 1          
2X17 2/17/95 "End Game" 2 End Game        
2X18 2/24/95 "Fearful Symmetry" "Zoo"   "Tiger, Tiger"    
2X19 3/10/95 "Dod Kalm" Dead Calm     "Død Kälm" "Dead Calm"
2X20 3/31/95 "Humbug"          
2X21 4/14/95 "The Calusari"          
2X22 4/28/95 "F. Emasculata"     "Quarantine"    
2X23 5/5/95 "Soft Light"     "Dark Matter"    
2X24 5/12/95 "Our Town" Our Town        
2X25 5/19/95 "Anasazi" 1   "The Unanswered File"      
S1 5/19/95 The Secrets of The X-Files          
Season 3 - 3X01 9/22/95 "The Blessing Way" 2   "The Unanswered File"      
3X02 9/29/95 "Paper Clip" 3   "The Unanswered File"      
3X03 10/6/95 "D.P.O."     "Voltage" "Darren P. Oswald"  
3X04 10/13/95 "Clyde Bruckman's Final Repose"          
3X05 10/20/95 "The List"          
3X06 11/3/95 "2Shy"          
3X07 11/10/95 "The Walk"          
3X08 11/17/95 "Oubliette"     "Empathy"    
3X09 11/24/95 "Nisei" 1   "82517"     "Second Generation"
3X10 12/1/95 "731" 2   "82517"   "Mulder on the Orient Express"  
3X11 12/15/95 "Revelations"          
3X12 1/5/96 "War of the Coprophages" War of the Worlds   "Die, Bug, Die!"   "War of the Dung Eaters"
3X13 1/26/96 "Syzygy"     "Bad Sign"    
3X14 2/2/96 "Grotesque"          
3X15 2/9/96 "Piper Maru" 1          
3X16 2/16/96 "Apocrypha" 2          
3X17 2/23/96 "Pusher"     "Control"    
3X18 3/8/96 "Teso Dos Bichos"          
3X19 3/29/96 "Hell Money"     "Hungry Ghosts"    
3X20 4/12/96 "Jose Chung's 'From Outer Space'" "Eth Snafu"     "José Chung's From Outer Space" "The Situation All Fouled"
3X21 4/26/96 "Avatar"          
3X22 5/3/96 "Quagmire"          
S2 5/10/96 More Secrets of The X-Files          
3X23 5/10/96 "Wetwired"          
3X24 5/17/96 "Talitha Cumi" 1   "Master Plan"     "Little Girl Arise"
The Game - 3X99 6/11/98 "Agrippa"          
Season 4 - 4X01 10/4/96 "Herrenvolk" 2   "Master Plan"     "Master Race"
4X02 10/27/96 "Unruhe"     "Howlers" "Unrühe" "Unrest"
4X03 10/11/96 "Home"          
4X04 10/18/96 "Teliko"         "End"
4X05 11/3/96 "The Field Where I Died"          
4X06 11/10/96 "Sanguinarium"         "Place of Blood"
4X07 11/17/96 "Musings of a Cigarette-Smoking Man" "Memoirs of a Cigarette-Smoking Man"        
4X08 12/15/96 "Paper Hearts"          
4X09 11/24/96 "Tunguska" 1          
4X10 12/1/96 "Terma" 2       "Tyurma"  
4X11 1/12/97 "El Mundo Gira"         "The World Turns"
4X12 2/16/97 "Kaddish"          
4X13 2/2/97 "Never Again"          
4X14 1/26/97 "Leonard Betts"   "Cancer" "Regeneration"    
4X15 2/9/97 "Memento Mori"   "Cancer"     "Reminder of Death"
4X16 2/23/97 "Unrequited"         "Not Avenged"
4X17 3/16/97 "Tempus Fugit" 1         "Time Flies"
4X18 3/23/97 "Max" 2 "Flight 549"        
4X19 4/13/97 "Synchrony" "Deja Vu"     "Déjà Vû"  
4X20 4/20/97 "Small Potatoes"          
4X21 4/27/97 "Zero Sum"          
4X22 5/4/97 "Elegy" "Tulpa," "Revenant"        
4X23 5/11/97 "Demons"          
4X24 5/18/97 "Gethsemane" 1          
Season 5 - 5X01 11/16/97 "Unusual Suspects" The Usual Suspects        
5X02 11/2/97 "Redux" 2          
5X03 11/9/97 "Redux II" 3          
5X04 11/23/97 "Detour"          
5X05 12/7/97 "Christmas Carol" 1          
5X06 11/30/97 "The Post-Modern Prometheus" "Post-Modern Prometheus," Frankenstein: Or the Modern Prometheus        
5X07 12/14/97 "Emily" 2          
5X08 1/4/98 "Kitsunegari"       "Kitsune-gari" "Fox Hunt"
5X09 1/11/98 "Schizogeny"       "Schizogony"  
SP9840 2/1/98 Inside The X-Files          
5X10 2/8/98 "Chinga"   "Bunghoney"      
5X11 2/15/98 "Kill Switch"          
5X12 2/22/98 "Bad Blood"          
5X13 3/1/98 "Patient X" 1 "Bloodlines"        
5X14 3/8/98 "The Red and the Black" 2 The Red and the Black, "Guildes Steersman"        
5X15 3/29/98 "Travelers"       "Travellers"  
5X16 4/19/98 "Mind's Eye"          
5X17 4/26/98 "All Souls"          
5X18 5/3/98 "The Pine Bluff Variant"          
5X19 5/10/98 "Folie a Deux" "Menage a Deux"     "Folie á Deux"  
5X20 5/17/98 "The End" 1 "End Game," "Zijgansk"/"Zjigansk"/
"Zhigansk," "Ochotsk"/"Okhotsk"
       
THE MOVIE 6/19/98 The X-Files The X-Files: Fight the Future, The X-Files: The Date is Set, Blackwood, The X-Files: Blackwood, Blackwood: The X-Files, The X-Files: The Movie, Set the Date, Fighting [for] the Future, Fight the Future        
Season 6 - 6X01 11/8/98 "The Beginning" 2          
6X02 11/15/98 "Drive" "Driven"        
6X03 11/22/98 "Triangle" "Ghost Ship," "Gray Ghost"*        
6X04 11/29/98 "Dreamland" 1          
6X05 12/6/98 "Dreamland II" 2          
6X06 1/3/99 "Terms of Endearment" Terms of Endearment        
6X07 1/10/99 "The Rain King"          
6X08 12/13/98 "How the Ghosts Stole Christmas" How the Grinch Stole Christmas, "The Ghosts That Stole Christmas," "The Ghosts Who Stole Christmas"     "My Dinner with Scully"  
6X09 1/24/99 "Tithonus"          
6X10 1/17/99 "S.R. 819"       "Senate Resolution 819"  
6X11 2/7/99 "Two Fathers" 1 "Xeox Pur Soli," "Full Disclosure"       "Together Yet Alone"
6X12 2/14/99 "One Son" 2 "Weary Men," "Full Disclosure"        
6X13 3/7/99 "Arcadia"       "Mr. Hanky"  
6X14 2/21/99 "Agua Mala"         "Bad Water" or "Jellyfish"
6X15 2/28/99 "Monday" "Mobius"     "Möbius"  
6X16 3/28/99 "Alpha"          
6X17 4/11/99 "Trevor"       "Trever"  
6X18 4/18/99 "Milagro"         "Miracle"
6X19 5/2/99 "Three of a Kind" "B.R.M."*     "Biological Response Modifier"  
6X20 4/25/99 "The Unnatural" "Black Sun," "Black Diamond," The Natural     "Roswell," "Aliens in the Outfield"  
6X21 5/9/99 "Field Trip"          
6X22 5/16/99 "Biogenesis" 1 "Lies,"* "The Syndicate"        
Season 7 - 7X01 11/21/99 "Hungry" "Burgerlicious"        
7X02 12/12/99 "The Goldberg Variation"          
7X03 11/7/99 "The Sixth Extinction" 2 "Plans,"* "Exodus,"* "The Syndicate"        
7X04 11/14/99 "The Sixth Extinction II: Amor Fati" 3 "Prophecy,"* "The Syndicate," "The Sixth Extinction: Amor Fati"       "Love of Fate"
7X05 11/28/99 "Millennium" Millennium, "Strawberry.com"*        
7X06 12/5/99 "Rush"          
7X07 1/9/00 "Orison"         "Prayer"
7X08 1/16/00 "The Amazing Maleeni" "The Great Maleeni"*        
7X09 1/23/00 "Signs and Wonders"       "Signs & Wonders"  
7X10 2/6/00 "Sein Und Zeit" 1         "Being and Time"
7X11 2/13/00 "Closure" 2 "Sein Und Zeit: Aliatope"        
7X12 2/20/00 "X-Cops" Cops, "Bad Boys"        
7X13 2/27/00 "First Person Shooter"          
7X14 3/12/00 "Theef"          
7X15 3/19/00 "En Ami"         "As a Friend"
7X16 4/2/00 "Chimera"          
7X17 4/9/00 "all things"          
7X18 4/30/00 "Hollywood A.D."          
7X19 4/16/00 "Brand X"          
7X20 5/7/00 "Fight Club" Fight Club        
7X21 5/14/00 "Je Souhaite"         "I Wish"
7X22 5/21/00 "Requiem"          
Season 8 - 8X01 11/5/00 "Within" 1 "Third Party"        
8X02 11/12/00 "Without" 2          
8X03 12/10/00 "Redrum"          
8X04 11/19/00 "Patience"          
8X05 11/26/00 "Roadrunners"          
8X06 12/3/00 "Invocation"          
8X07 12/17/00 "Via Negativa"         "By Way of Negation"
8X08 2/18/01 "Per Manum"         "By Hand"
8X09 1/7/01 "Surekill"       "SureKill"  
8X10 1/14/01 "Salvage"          
8X11 2/4/01 "The Gift"          
8X12 1/21/01 "Badlaa"         "Revenge"
8X13 2/11/01 "Medusa"          
8X14 2/25/01 "This is Not Happening" 1          
8X15 4/1/01 "DeadAlive" 2 Dead Alive        
8X16 4/29/01 "Vienen"         "They Come"
8X17 4/22/01 "Empedocles"          
8X18 4/8/01 "Three Words" 3          
8X19 5/6/01 "Alone" "A Dream Whose Sleep..."        
8X20 5/13/01 "Essence" 1          
8X21 5/20/01 "Existence" 2          
Season 9 - 9X01 11/11/01 "Nothing Important Happened Today" 1          
9X02 11/18/01 "Nothing Important Happened Today II" 2          
9X03 12/2/01 "Dæmonicus"       "Daemonicus"  
9X04 1/27/02 "Hellbound"          
9X05 12/9/01 "4-D"          
9X06 12/16/01 "Lord of the Flies" Lord of the Flies        
9X07 1/13/02 "John Doe" "July 4, 1972"        
9X08 1/6/02 "Trust No 1"          
9X09 3/31/02 "Underneath"          
9X10 3/3/02 "Provenance" 1          
9X11 3/10/02 "Providence" 2          
9X12 4/14/02 "Scary Monsters"          
9X13 3/17/02 "Audrey Pauley"          
9X14 4/7/02 "Improbable"          
9X15 4/21/02 "Jump the Shark"          
9X16 5/5/02 "Release" "Endgame"        
9X17 4/28/02 "William" "Endgame"        
9X18 5/12/02 "Sunshine Days" "Endgame"        
9X19 & 9X20 5/19/02 "The Truth" "Endgame"        

Lone Gunmen Episodes
Production Number Original Air Date Episode Title Previous/Working Title(s), Movie/Book/etc. Title Foreign Title Novelization Title Nickname/Alt. Spelling/Initials Translation
Season 1 - 1LGM79 3/4/01 "Pilot"/Pilot          
1LGM01 3/11/01 "Bond, Jimmy Bond"          
1LGM02 3/16/01 "Eine Kleine Frohike" "Eine Kleine Nachtmusik"       "A Little Frohike"
1LGM03 3/18/01 "Like Water for Octane" Like Water for Chocolate        
1LGM04 3/23/01 "Three Men and a Smoking Diaper" Three Men and a Baby, Smoking Gun        
1LGM05 4/6/01 "Planet of the Frohikes (or, A Short History of My Demeaning Captivity)" Planet of the Apes        
1LGM06 3/30/01 "Madam I'm Adam"          
1LGM07 4/13/01 "Maximum Byers" Maximum Bob        
1LGM08 4/20/01 "Diagnosis: Jimmy" Diagnosis: Murder        
1LGM09 5/4/01 "The Lying Game" The Crying Game        
1LGM10 4/27/01 "Tango de los Pistoleros"          
1LGM11 6/1/01 "The Cap'n Toby Show"          
1LGM12 5/11/01 "All About Yves" 1 All About Eve        

Harsh Realm Episodes
Production Number Original Air Date Episode Title Previous/Working Title(s), Movie/Book/etc. Title Foreign Title Novelization Title Nickname/Alt. Spelling/Initials Translation
Season 1 - 1H79 10/8/99 / 3/24/00 (FX) "Pilot"/Pilot          
1H01 10/15/99 / 3/31/00 (FX) "Leviathan"          
1H02 10/22/99 / 4/7/00 (FX) "Inga Fossa"         "In the Trenches"
1H03 10/29/99 (N/A) / 4/14/00 (FX) "Kein Ausgang"         "No Escape"
1H04 11/5/99 (N/A) / 5/5/00 (FX) "Manus Domini"         "Hand of God"
1H05 11/12/99 (N/A) / 4/28/00 (FX) "Three Percenters"          
1H06 4/21/00 (FX) "Reunion"          
1H07 5/12/00 (FX) "Cincinnati"          
1H08 5/19/00 (FX) "Camera Obscura"         "Dark Room"
1H09 N/A "Circe"          
1H10 N/A "Malfunction"          

XF episode titles that were rumored but never used:

"Epilogue"
"The Project"
"Il Fumatore"
XF episodes that were rumored to be made but weren't:

"The Empire"
"Nessie" (stopped in the middle of filming)
"Always"
"The Banshee"
"Night of the Living Dead"
"The Widow's Eye"

Here are the XF episodes in which the tagline has been changed, and the taglines:

"The Erlenmeyer Flask" - Trust No One
"Ascension" - Deny Everything
"Anasazi" - ÉÍ 'AANÍÍGÓÓ 'ÁHOOT'É
"731" - Apology is Policy
"Herrenvolk" - Everything Dies
"Teliko" - Deceive Inveigle Obfuscate
"Terma" - E Pur Si Muove
"Gethsemane" - Believe the Lie
"Redux" - All Lies Lead to the Truth
"The Red and the Black" - Resist or Serve
"The End" - The End
The X-Files - Fight the Future
"The Beginning" - The Beginning *
"Triangle" - Die Wahrheit Ist Irgendwo Da Draußen
"Two Fathers" - Trust No Truth *
"The Unnatural" - In the Big Inning
"The Sixth Extinction II: Amor Fati" - Amor Fati
"Closure" - Believe to Understand
"Nothing Important Happened Today II" - Nothing Important Happened Today
"4-D" - erehT tuO si hturT ehT
"Trust No 1" - They're Watching
"Improbable" - Dio Ti Ama

* Rumored but not changed.

There are several distinguishable types of X-Files episode titles:
  • Basic - one-word descriptions of the subject matter
    • "Ice"
    • "Fire"
    • "Space"
    • "Drive"
    • "Blood"
    • etc.
  • Names - can be characters' name or initials, or places, etc.
    • "Eve"
    • "Max"
    • "Emily"
    • "D.P.O."
    • "Trevor"
    • "Leonard Betts"
    • "F. Emasculata"
    • "Aubrey"
    • "Audrey Pauley"
    • "Duane Barry"
    • "Roland"
    • "Tooms"
    • "Orison"
    • "Deep Throat"
    • "Arcadia"
    • etc.
  • Foreign - foreign words or phrases relating to something important in the episode
    • "Die Hand Die Verletzt"
    • "Talitha Cumi"
    • "Herrenvolk"
    • "Tithonus"
    • "Tempus Fugit"
    • "Excelsius Dei"
    • "Dod Kalm"
    • "Unruhe"
    • "Kitsunegari"
    • "Milagro"
    • etc.
  • Long - long phrases
    • "Jose Chung's 'From Outer Space'"
    • "Clyde Bruckman's Final Repose"
    • "The Pine Bluff Variant"
    • "Musings of a Cigarette-Smoking Man"
    • "How the Ghosts Stole Christmas"
    • "Nothing Important Happened Today"
    • etc.
  • Word Variation - English words changed in some way
    • "Theef"
    • "Redrum"
  • Double Meaning - titles that refer to or mean more than one thing
    • "Three of a Kind"
    • "Field Trip"
    • "The Goldberg Variation"
    • "En Ami"
    • "Without"
    • "Jump the Shark"
  • Movie-Based - title taken from a movie, book, etc.
    • "Terms of Endearment"
    • "The Red and the Black"
    • "Unusual Suspects"
    • "War of the Coprophages"
    • "Our Town"
    • "Fight Club"
    • "Christmas Carol"
    • "Lord of the Flies"
    • etc.
  • Strange Words - little-known English words
    • "Unrequited"
    • "Oubliette"
    • "Syzygy"
    • "Schizogeny"
    • "Quagmire"
    • etc.
  • Letters and Numbers - these titles only contain letters, numbers, or both
    • "3"
    • "731"
    • "D.P.O."
    • "S.R. 819"
    • "4-D"
  • Matching Titles - sets of two episodes whose titles go together
    • "Two Fathers"/"One Son"
    • "The End"/"The Beginning"
    • etc.
  • "II" Titles - part 2 of a 2-parter featuring "II"
    • "Redux II"
    • "Dreamland II"
    • "The Sixth Extinction II: Amor Fati"
    • "Nothing Important Happened Today II"
  • Phrases - phrases and sayings in a title
    • "Never Again"
    • "Small Potatoes"
    • "Young at Heart"
    • "Ghost in the Machine"
    • "Mind's Eye"
    • etc.
  • Name Referrers - word(s) that refer to a main character, etc.
    • "Genderbender"
    • "Miracle Man"
    • "Fallen Angel"
    • "The Rain King"
    • etc.
  • Weird - titles that are, well, different
    • "X-Cops"
    • "all things"
    • "DeadAlive"

There are similarities between some The X-Files, Millennium, Harsh Realm, and The Lone Gunmen episode titles:

X-FilesMillenniumHarsh RealmLone Gunmen
"Pilot""Pilot""Pilot""Pilot"
"Paper Clip," "Paper Hearts""Paper Dove"  
"The End"/"The Beginning""The Beginning and the End"  
"Jose Chung's 'From Outer Space'""Jose Chung's Doomsday Defense"  
"Arcadia""In Arcadia Ego"  
"Closure""Closure"  
"Via Negativa""Via Dolorosa"  

Just for reference, X-Files episodes are numbered like this: "6X22," "6AB22," "6ABX22" ("ABX" starting 6th season only), "6X22/6AB22," "XF-622" (the format used for all Fox shows), or "#06X22." The first method is the most popular and most widely used. Millennium episodes are numbered like this: "#MLM-223" or "2M23." Harsh Realm episodes are numbered "1ADC01," "HR-101," or "1H01." Lone Gunmen episodes are numbered like this: 1AEB01 or 1LGM01. In the first three cases, the first digit is the season and the second two are the episode number in that season.


Thanks to The X-Files Information Complex, The X-Files In-Jokes List, and the official site. Those are the main sources from which I have compiled this information.

Check out this page for the names of The X-Files in different countries. Cool!