Special Guest Stars Paul Lukas as Dr. Claus Stoller Guest Stars Lynn Loring as Christine Hobson Christopher Jones as Greg Martin Co Starring George Savalas as Greek Merchant Dick Cherney as Commuter at Airport Raoul Perez as Flores Vicki Carbe as Lisandra Socrates Ballis as Policeman #1 John Nealson as Student #7 Lyn Peters as Miss Lamb D'Urville Martin as Student #5 Martin Kosleck as Hotel Porter Milton Parsons as Waiter Joel Michaels as Agent #1 Uncredited Barbara Moore as Lisa Rogers Arthur Tovey as Fencing Match Spectator Paul Bradley as Restaurant Patron Hank Robinson as Commuter at Airport