S08E12: Medusa
Scully and Doggett must race against the clock to investigate and fight off a contagion lurking in the subway tunnels of Boston.
Previous Episode 
Season 1
Pilot
S1E1 / 10 Sep 1993
Deep Throat
S1E2 / 17 Sep 1993
Squeeze
S1E3 / 24 Sep 1993
Conduit
S1E4 / 01 Oct 1993
The Jersey Devil
S1E5 / 08 Oct 1993
Shadows
S1E6 / 22 Oct 1993
Ghost in the Machine
S1E7 / 29 Oct 1993
Ice
S1E8 / 05 Nov 1993
Space
S1E9 / 12 Nov 1993
Fallen Angel
S1E10 / 19 Nov 1993
Eve
S1E11 / 10 Dec 1993
Fire
S1E12 / 17 Dec 1993
Beyond the Sea
S1E13 / 07 Jan 1994
Gender Bender
S1E14 / 21 Jan 1994
Lazarus
S1E15 / 04 Feb 1994
Young at Heart
S1E16 / 11 Feb 1994
E.B.E.
S1E17 / 18 Feb 1994
Miracle Man
S1E18 / 18 Mar 1994
Shapes
S1E19 / 01 Apr 1994
Darkness Falls
S1E20 / 15 Apr 1994
Tooms
S1E21 / 22 Apr 1994
Born Again
S1E22 / 29 Apr 1994
Roland
S1E23 / 06 May 1994
The Erlenmeyer Flask
S1E24 / 13 May 1994
Season 2
Little Green Men
S2E1 / 16 Sep 1994
The Host
S2E2 / 23 Sep 1994
Blood
S2E3 / 30 Sep 1994
Sleepless
S2E4 / 07 Oct 1994
Duane Barry (1)
S2E5 / 14 Oct 1994
Ascension (2)
S2E6 / 21 Oct 1994
3
S2E7 / 04 Nov 1994
One Breath
S2E8 / 11 Nov 1994
Firewalker
S2E9 / 18 Nov 1994
Red Museum
S2E10 / 09 Dec 1994
Excelsis Dei
S2E11 / 16 Dec 1994
Aubrey
S2E12 / 06 Jan 1995
Irresistible
S2E13 / 13 Jan 1995
Die Hand Die Verletzt
S2E14 / 27 Jan 1995
Fresh Bones
S2E15 / 03 Feb 1995
Colony (1)
S2E16 / 10 Feb 1995
End Game (2)
S2E17 / 17 Feb 1995
Fearful Symmetry
S2E18 / 24 Feb 1995
Død Kalm
S2E19 / 10 Mar 1995
Humbug
S2E20 / 31 Mar 1995
The Calusari
S2E21 / 14 Apr 1995
F. Emasculata
S2E22 / 28 Apr 1995
Soft Light
S2E23 / 05 May 1995
Our Town
S2E24 / 12 May 1995
Anasazi (1)
S2E25 / 19 May 1995
Season 3
The Blessing Way (2)
S3E1 / 22 Sep 1995
Paper Clip (3)
S3E2 / 29 Sep 1995
D.P.O.
S3E3 / 06 Oct 1995
Clyde Bruckman's Final Repose
S3E4 / 13 Oct 1995
The List
S3E5 / 20 Oct 1995
2Shy
S3E6 / 03 Nov 1995
The Walk
S3E7 / 10 Nov 1995
Oubliette
S3E8 / 17 Nov 1995
Nisei (1)
S3E9 / 24 Nov 1995
731 (2)
S3E10 / 01 Dec 1995
Revelations
S3E11 / 15 Dec 1995
War of the Coprophages
S3E12 / 05 Jan 1996
Syzygy
S3E13 / 26 Jan 1996
Grotesque
S3E14 / 02 Feb 1996
Piper Maru (1)
S3E15 / 09 Feb 1996
Apocrypha (2)
S3E16 / 16 Feb 1996
Pusher
S3E17 / 23 Feb 1996
Teso Dos Bichos
S3E18 / 08 Mar 1996
Hell Money
S3E19 / 29 Mar 1996
Jose Chung's "From Outer Space"
S3E20 / 12 Apr 1996
Avatar
S3E21 / 26 Apr 1996
Quagmire
S3E22 / 03 May 1996
Wetwired
S3E23 / 10 May 1996
Talitha Cumi (1)
S3E24 / 17 May 1996
Season 4
Herrenvolk (2)
S4E1 / 04 Oct 1996
Home
S4E2 / 11 Oct 1996
Teliko
S4E3 / 18 Oct 1996
Unruhe
S4E4 / 27 Oct 1996
The Field Where I Died
S4E5 / 03 Nov 1996
Sanguinarium
S4E6 / 10 Nov 1996
Musings of a Cigarette Smoking Man
S4E7 / 17 Nov 1996
Tunguska (1)
S4E8 / 24 Nov 1996
Terma (2)
S4E9 / 01 Dec 1996
Paper Hearts
S4E10 / 15 Dec 1996
El Mundo Gira
S4E11 / 12 Jan 1997
Leonard Betts
S4E12 / 26 Jan 1997
Never Again
S4E13 / 02 Feb 1997
Memento Mori
S4E14 / 09 Feb 1997
Kaddish
S4E15 / 16 Feb 1997
Unrequited
S4E16 / 23 Feb 1997
Tempus Fugit (1)
S4E17 / 16 Mar 1997
Max (2)
S4E18 / 23 Mar 1997
Synchrony
S4E19 / 13 Apr 1997
Small Potatoes
S4E20 / 20 Apr 1997
Zero Sum
S4E21 / 27 Apr 1997
Elegy
S4E22 / 04 May 1997
Demons
S4E23 / 11 May 1997
Gethsemane (1)
S4E24 / 18 May 1997
Season 5
Redux (2)
S5E1 / 02 Nov 1997
Redux II (3)
S5E2 / 09 Nov 1997
Unusual Suspects
S5E3 / 16 Nov 1997
Detour
S5E4 / 23 Nov 1997
The Post-Modern Prometheus
S5E5 / 30 Nov 1997
Christmas Carol (1)
S5E6 / 07 Dec 1997
Emily (2)
S5E7 / 14 Dec 1997
Kitsunegari
S5E8 / 04 Jan 1998
Schizogeny
S5E9 / 11 Jan 1998
Chinga
S5E10 / 08 Feb 1998
Kill Switch
S5E11 / 15 Feb 1998
Bad Blood
S5E12 / 22 Feb 1998
Patient X (1)
S5E13 / 01 Mar 1998
The Red and the Black (2)
S5E14 / 08 Mar 1998
Travelers
S5E15 / 29 Mar 1998
Mind’s Eye
S5E16 / 19 Apr 1998
All Souls
S5E17 / 26 Apr 1998
The Pine Bluff Variant
S5E18 / 03 May 1998
Folie à Deux
S5E19 / 10 May 1998
The End
S5E20 / 17 May 1998
Season 6
The Beginning
S6E1 / 08 Nov 1998
Drive
S6E2 / 15 Nov 1998
Triangle
S6E3 / 22 Nov 1998
Dreamland (1)
S6E4 / 29 Nov 1998
Dreamland II (2)
S6E5 / 06 Dec 1998
How the Ghosts Stole Christmas
S6E6 / 13 Dec 1998
Terms of Endearment
S6E7 / 03 Jan 1999
The Rain King
S6E8 / 10 Jan 1999
S.R. 819
S6E9 / 17 Jan 1999
Tithonus
S6E10 / 24 Jan 1999
Two Fathers (1)
S6E11 / 07 Feb 1999
One Son (2)
S6E12 / 14 Feb 1999
Agua Mala
S6E13 / 21 Feb 1999
Monday
S6E14 / 28 Feb 1999
Arcadia
S6E15 / 07 Mar 1999
Alpha
S6E16 / 28 Mar 1999
Trevor
S6E17 / 11 Apr 1999
Milagro
S6E18 / 18 Apr 1999
The Unnatural
S6E19 / 25 Apr 1999
Three of a Kind
S6E20 / 02 May 1999
Field Trip
S6E21 / 09 May 1999
Biogenesis (1)
S6E22 / 16 May 1999
Season 7
The Sixth Extinction (2)
S7E1 / 07 Nov 1999
The Sixth Extinction II: Amor Fati (3)
S7E2 / 14 Nov 1999
Hungry
S7E3 / 21 Nov 1999
Millennium
S7E4 / 28 Nov 1999
Rush
S7E5 / 05 Dec 1999
The Goldberg Variation
S7E6 / 12 Dec 1999
Orison
S7E7 / 09 Jan 2000
The Amazing Maleeni
S7E8 / 16 Jan 2000
Signs and Wonders
S7E9 / 23 Jan 2000
Sein Und Zeit (1)
S7E10 / 06 Feb 2000
Closure (2)
S7E11 / 13 Feb 2000
X-Cops
S7E12 / 20 Feb 2000
First Person Shooter
S7E13 / 27 Feb 2000
Theef
S7E14 / 12 Mar 2000
En Ami
S7E15 / 19 Mar 2000
Chimera
S7E16 / 02 Apr 2000
all things
S7E17 / 09 Apr 2000
Brand X
S7E18 / 16 Apr 2000
Hollywood A.D.
S7E19 / 30 Apr 2000
Fight Club
S7E20 / 07 May 2000
Je Souhaite
S7E21 / 14 May 2000
Requiem
S7E22 / 21 May 2000
Season 8
Within (1)
S8E1 / 05 Nov 2000
Without (2)
S8E2 / 12 Nov 2000
Patience
S8E3 / 19 Nov 2000
Roadrunners
S8E4 / 26 Nov 2000
Invocation
S8E5 / 03 Dec 2000
Redrum
S8E6 / 10 Dec 2000
Via Negativa
S8E7 / 17 Dec 2000
Surekill
S8E8 / 07 Jan 2001
Salvage
S8E9 / 14 Jan 2001
Badlaa
S8E10 / 21 Jan 2001
The Gift
S8E11 / 04 Feb 2001
Medusa
S8E12 / 11 Feb 2001
Per Manum
S8E13 / 18 Feb 2001
This Is Not Happening (1)
S8E14 / 25 Feb 2001
Deadalive (2)
S8E15 / 01 Apr 2001
Three Words
S8E16 / 08 Apr 2001
Empedocles
S8E17 / 22 Apr 2001
Vienen
S8E18 / 29 Apr 2001
Alone
S8E19 / 06 May 2001
Essence (1)
S8E20 / 13 May 2001
Existence (2)
S8E21 / 20 May 2001
Season 9
Nothing Important Happened Today (1)
S9E1 / 11 Nov 2001
Nothing Important Happened Today II (2)
S9E2 / 18 Nov 2001
Dæmonicus
S9E3 / 02 Dec 2001
4-D
S9E4 / 09 Dec 2001
Lord of the Flies
S9E5 / 16 Dec 2001
Trust No 1
S9E6 / 06 Jan 2002
John Doe
S9E7 / 13 Jan 2002
Hellbound
S9E8 / 27 Jan 2002
Provenance (1)
S9E9 / 03 Mar 2002
Providence (2)
S9E10 / 10 Mar 2002
Audrey Pauley
S9E11 / 17 Mar 2002
Underneath
S9E12 / 31 Mar 2002
Improbable
S9E13 / 07 Apr 2002
Scary Monsters
S9E14 / 14 Apr 2002
Jump the Shark
S9E15 / 21 Apr 2002
William
S9E16 / 28 Apr 2002
Release
S9E17 / 05 May 2002
Sunshine Days
S9E18 / 12 May 2002
The Truth (1)
S9E19 / 19 May 2002
The Truth (2)
S9E20 / 19 May 2002
Season 10
My Struggle
S10E1 / 24 Jan 2016
Founder's Mutation
S10E2 / 25 Jan 2016
Mulder & Scully Meet the Were-Monster
S10E3 / 01 Feb 2016
Home Again
S10E4 / 08 Feb 2016
Babylon
S10E5 / 15 Feb 2016
My Struggle II
S10E6 / 22 Feb 2016
Season 11
My Struggle III
S11E1 / 03 Jan 2018
This
S11E2 / 10 Jan 2018
Plus One
S11E3 / 17 Jan 2018
The Lost Art of Forehead Sweat
S11E4 / 24 Jan 2018
Ghouli
S11E5 / 31 Jan 2018
Kitten
S11E6 / 07 Feb 2018
Rm9sbG93ZXJz
S11E7 / 28 Feb 2018
Familiar
S11E8 / 07 Mar 2018
Nothing Lasts Forever
S11E9 / 14 Mar 2018
My Struggle IV
S11E10 / 21 Mar 2018
David Duchovny
Fox Mulder
Gillian Anderson
Dana Scully
