Dr. Niblock (as Jack Livingstone)
Ward Hutton
Função desconhecida
Bob Harvey
Patrick McCree
Gene Stratton
Brian Trelawney
Charles Lunkin
Dr. George Wainright
Claude Roberts
Rolf Rutherford
Dr. Howard
Jim Gordon
Donald Luther
Martin Ellsworth
Carey Larned
Calvin Stone
James Norvall
Capt. James Morrison
