Hugh Lockwood
Heideline 'Uli' Ullman
V.C.R. Cameron
Frieda Ullman
Gloria Harding
Harold L. Streeter (as Sir John Gielgud)
Dr. Edward Laurent
Cheyne
Kurt van Niestat
Felix Ernst
Dr. Griffin
Carlos Lobos (as A. Martinez)
Kuroda
Miss Keach
Reinhardt Brugge
Self (archive footage)
Hotel Clerk (uncredited)
Waiter (uncredited)
Guard (uncredited)
Lockwood's Girl (uncredited)
Stewardess (uncredited)
Hotel Guest (uncredited)
Aaron Johannes (uncredited)