The X-Files/Memento Mori
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Memento Mori is the fourteenth episode of the fourth season of The X-Files, and the eighty-seventh episode overall.
Guest Stars: Mitch Pileggi (Assistant Director Walter Skinner), William B. Davis (Cigarette Smoking Man), Sheila Larken (Margaret Scully), David Lovgren (Kurt Crawford), Gillian Barber (Penny Northern), Tom Braidwood (Frohike), Dean Haglund (Langly), Bruce Harwood (Byers)