

A bomb dooms the first space satellite, manned by a selfless crew, a stowaway reporter (Lois Maxwell) and a mad scientist (Donald Wolfit).

Kieron Moore
Cmdr. Michael Haydon

Lois Maxwell
Kim Hamilton

Donald Wolfit
Prof. Merrity

Bryan Forbes
Jimmy Wheeler

Jimmy Hanley
Larry Noble
Barry Keegan
Lefty

Walter Hudd
Professor Blandford

Donald Gray
Captain Ross
Thea Gregory
Barbara Noble
Shirley Lawrence
Ellen
Peter Neil
Tony
Ryck Rydon
Reporter

Ronan O'Casey
Reporter

Robert O'Neil
Reporter

Alan Gifford
Colonel Galloway
Charles Richardson
General Barnett

Carl Jaffe
Professor Bechstein
Leonard Sharp
Thomas the Watchman (uncredited)
Paul Beradi
Reporter (uncredited)
Patrick Halpin
Reporter (uncredited)
Paul Dickson
John C. Mather, J.T. McIntosh, Edith Dell
Released