Jack Livingston

as Ward Hutton

as Bob Harvey

as Gene Stratton

as Douglas Ferguson

as James Norvall

as Dr. George Wainright

as Claude Roberts

as Dr. Niblock (as Jack Livingstone)

as Dave Langdon

as Randolph Shaw

as Reginald Dunstan

as Karl le Barron

as Carey Larned

as Grant Barton

as Jim Gordon

as Capt. James Morrison

as Patrick McCree

as Donald Luther

as Charles Lunkin

as Dr. Howard

as Aaron King - Art

as Calvin Stone

as Captain Drake

as Sid Wilson

as Brian Trelawney

as Rolf Rutherford

as Stephen Pachmann (as Jack Livingstone)

as Martin Ellsworth

as Jack Livingston