The X-Files/Existence (2)
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Existence (2) is the twenty-first episode of the eighth season of The X-Files, and the one hundred eighty-second episode overall.
Guest Stars: Nicholas Lea (Alex Krycek), Annabeth Gish (Special Agent Monica Reyes), Mitch Pileggi (Assistant Director Walter Skinner), James Pickens Jr. (Deputy Director Kersh), Kirk B.R. Woller (Agent Gene Crane), Tom Braidwood (Frohike), Dean Haglund (Langly), Bruce Harwood (Byers), Zachary Ansley (Billy Miles), Austin Tichenor (Dr. James Langenhahn), Adam Baldwin (Knowle Rohrer)