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Vigil of Fear is the eighteenth episode of the sixth season of Quincy, M.E., and the one hundredth episode overall.
Guest Stars: Lonny Chapman (Ernie Spuill), Ned Romero (Ruben), Ray Vitte, Lenny Bari (Frank Penner), George O'Hanlon, Jr., Paul Koslo (John Doe killer)
Co-Starring: Peter Virgo, Jr. (Tony Penner), George Reynolds (George Maples), Andre Harvey (Jo-Jo), Henry Slate (Mole), Dave Morick (Clerk)
With: Marc Scott Taylor (Marc), Eddie Garrett (Eddie), John Nolan (John), Diane Markoff (Waitress), Filip Field (Lab Techincian)