Feature version of the 1949 serial, KING OF THE ROCKETMEN: Young member of scientific group uses new rocket-powered flying suit to thwart shadowy saboteur known only as "Dr. Vulcan".

Tristram Coffin
as Prof. Jeff King

Mae Clarke
as Glenda Thomas

Don Haggerty
as Tony Dirken

House Peters Jr.
as Burt Winslow

James Craven
as Prof. Millard

I. Stanford Jolley
as Prof. Bryant

Ted Adams
as Martin Conway

Marshall Bradford
as Dr. Graffner

Stanley Price
as Gunther von Strum

Douglas Evans
as Civil Defense Chairman