Kieron Moore
Cmdr. Michael Haydon
Acting
Lois Maxwell
Kim Hamilton
Acting
Donald Wolfit
Prof. Merrity
Acting
Bryan Forbes
Jimmy Wheeler
Directing
Jimmy Hanley
Larry Noble
Acting
Barry Keegan
Lefty
Acting
Walter Hudd
Professor Blandford
Acting
Donald Gray
Captain Ross
Acting
Thea Gregory
Barbara Noble
Acting
Shirley Lawrence
Ellen
Acting
Peter Neil
Tony
Acting
Ryck Rydon
Reporter
Acting
Ronan O'Casey
Reporter
Acting
Robert O'Neil
Reporter
Acting
Alan Gifford
Colonel Galloway
Acting
Charles Richardson
General Barnett
Acting
Carl Jaffe
Professor Bechstein
Acting
Leonard Sharp
Thomas the Watchman (uncredited)
Acting
Paul Beradi
Reporter (uncredited)
Acting
Patrick Halpin
Reporter (uncredited)
Acting
Terry Randall
Reporter (uncredited)
Acting
Bill Nagy
Reporter (uncredited)
Acting
Terry Randall
Reporter (uncredited)
Acting
John Wilder
Reporter (uncredited)
Acting
Johnny Wyne
Reporter (uncredited)
Acting
Trevor Reid
Simmons the Technician (uncredited)
Acting
Bernard Bresslaw
Technician (uncredited)
Acting
Alastair Hunter
Technician (uncredited)
Acting
Jane Dore
Young Girl (uncredited)
Acting
Frank Sieman
Gatekeeper (uncredited)
Acting
John Baker
Official (uncredited)
Acting
Tony Quinn
Jack the Barman
Acting
Tony Quinn
Jack the Barman (uncredited)
Acting