Kadro (32)
Peter O'TooleDr. Harry Wolper
Mariel HemingwayMeli
Vincent SpanoBoris Lafkin
Virginia MadsenBarbara Spencer
David Ogden StiersDr. Sid Kullenbeck
John DehnerPaul
James MurrayMartin Goodwin (uncredited)
Karen KopinsLucy Wolper
Kenneth TigarPavlo
Rance HowardMr. Spencer
Elsa RavenMrs. MalloryLee KesslerMrs. Pruitt
Ellen GeerMrs. Spencer
Ian WolfeProf. Brauer
Mike JollyBoom-BoomBurton CollinsLymanJudith HansenKaren
Doug CoxArthur
Anthony PeckNormanCrawford BinionFred
Byrne PivenKraussVincent CobbHamberg
Gary BayerBovi
Jordan CharneyDr. Whitaker
William BassettDr. SutterSandy IgnonDr. Franklin
Jeff CoreyDean Harrington
Michael McGradyLarry
Eve McVeaghWoman with Monkey
Al FannGuard
Michael GreeneGuard
James MurrayMartin Goodwin (uncredited)