An evil prince plans to use a super-explosive to take over the world.
Shirley Mason
as Barbara Hackett
Buck Jones
as Brick McDonald (as Charles Jones)
Richard Tucker
as Herbert Glenville
Alan Hale
as Prince Stefan de Bernie
Walter McGrail
as Dick Manley
June Elvidge
as Estelle Hackett
Fred Kelsey
as The Submarine Commander
Nigel De Brulier
as Mordecai Newman
Fred Kohler
as Barbara's Uncle
