Special Guest Stars Michael Rennie as Magnus Guest Stars Katherine Justice as Helen William Smithers as Nat Greely Patricia Smith as Edna Greely Co Starring Frank Marth as Alien #1 Dabney Coleman as Captain Mitchell Ross Paul Carr as Billy Stearns Harry Lauter as Alien #2 Erik Holland as M.P. Alien Robert Doyle as Sgt. Walter Ruddell Johnny Jensen as Young Nat
