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Steven Williams as Mr. X

The X-Files

Steven Williams
Sleepless
2x04 Sleepless
1994-10-07
Ascension (2)
2x06 Ascension (2)
1994-10-21
One Breath
2x08 One Breath
1994-11-11
Fresh Bones
2x15 Fresh Bones
1995-02-03
End Game (2)
2x17 End Game (2)
1995-02-17
Soft Light
2x23 Soft Light
1995-05-05
Nisei (1)
3x09 Nisei (1)
1995-11-24
731 (2)
3x10 731 (2)
1995-12-01
Wetwired
3x23 Wetwired
1996-05-10
Talitha Cumi (1)
3x24 Talitha Cumi (1)
1996-05-17
Herrenvolk (2)
4x01 Herrenvolk (2)
1996-10-04
Unusual Suspects
5x03 Unusual Suspects
1997-11-16
The Truth (1)
9x19 The Truth (1)
2002-05-19