Guest Stars Bruce Dern as Ben Garth Michael Tolan as Professor Stephen Grave Robert F. Simon as General Maximillian R. Hart Olive Deering as Lisa Lawrence Claude Woolman as Major Roger Hill Uncredited Lex Johnson as Communications Operator George Sims as Computer Technician Bob Johnson voices Radio Newscaster Bob Johnson voices Zanti Regent Bob Johnson voices Zanti Commander Vic Perrin as Zanti Government Official Joe E. Tata as Radar Operator Bill Hart as Corporal Delano Michael T. Mikler as Air Police Sergeant
