When a plague-like illness kills ten men inside a maximum security prison, Scully tries to get into the quarantine site and discover the cause and origin of the contagion, while Mulder and a group of US Marshals track two escapees who may be infected.
Quest roles:
Mitch Pileggi(Walter Skinner), William B. Davis(Cigarette Smoking Man), Alvin Sanders(Bus Driver), Lynda Boyd(Elizabeth), Chilton Crane(Sharon Graffia), Angelo Vacco(Doorman), John Pyper-Ferguson(Paul), Jenny-Lynn Hutcheson(Addie Sparks (uncredited)), Dean Norris(Marshal Tapia), Charles Martin Smith(Dr. Osbourne), John Tench(Steve), Morris Panych(Gray Haired Man), Kim Kondrashoff(Bobby Torrence), Bill Rowat(Dr. Torrence), Jude Zachary(Jones (uncredited)), Brent Chapman(Traffic Cop), Myles Ferguson(Boy in the Bus (uncredited))