Cast
Ludwig Donath
Dr. Karger
Harry Strang
Brophy, museum watchman
Thomas E. Jackson
Det. Capt. Quinn
Richard Hale
Curator Raymond Halliday
Edward Earle
E. R. Willard
Jim Bannon
Jack Packard
Frank Wilcox
Prof. Arthur Logan
Mary Newton
Nurse
John Elliott
John, butler
Frank Mayo
Quentin Mitchell
Coulter Irwin
Frank, Willard's aide
Anita Louise
Janet Mitchell
Michael Duane
Rex Kennedy
Barton Yarborough
Doc Long
Paul E. Burns
Leon Hartman
Mona Barrie
Louise Mitchell