Guest Stars Robert Webber as Ikar Co Starring Gail Kobe as Janet Lane Curt Conway as Franklin Karlin Warren Stevens as Professor Eric Plummer Edward Platt as David Hunt Uncredited Fred Krone as Stunt Eric Fred Stromsoe as Stunt Ikar Mike Lane as Ikar (Alien) Hugh Langtry as Alien Soldier #1 Gene Wiley as Alien Soldier #2 Leroy Ellis as Alien Soldier #3