
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

Walter Hudd
Professor Blandford
Acting

Donald Gray
Captain Ross
Acting
![Thea Gregory]()
Thea Gregory
Barbara Noble
Acting
![Shirley Lawrence]()
Shirley Lawrence
Ellen
Acting

Ronan O'Casey
Reporter
Acting

Robert O'Neil
Reporter
Acting

Alan Gifford
Colonel Galloway
Acting
![Charles Richardson]()
Charles Richardson
General Barnett
Acting

Carl Jaffe
Professor Bechstein
Acting
![Leonard Sharp]()
Leonard Sharp
Thomas the Watchman (uncredited)
Acting
![Paul Beradi]()
Paul Beradi
Reporter (uncredited)
Acting
![Patrick Halpin]()
Patrick Halpin
Reporter (uncredited)
Acting
![Terry Randall]()
Terry Randall
Reporter (uncredited)
Acting

Bill Nagy
Reporter (uncredited)
Acting
![Terry Randall]()
Terry Randall
Reporter (uncredited)
Acting
![John Wilder]()
John Wilder
Reporter (uncredited)
Acting
![Johnny Wyne]()
Johnny Wyne
Reporter (uncredited)
Acting

Trevor Reid
Simmons the Technician (uncredited)
Acting

Bernard Bresslaw
Technician (uncredited)
Acting

Alastair Hunter
Technician (uncredited)
Acting
![Jane Dore]()
Jane Dore
Young Girl (uncredited)
Acting
![Frank Sieman]()
Frank Sieman
Gatekeeper (uncredited)
Acting
![John Baker]()
John Baker
Official (uncredited)
Acting
![Tony Quinn]()
Tony Quinn
Jack the Barman
Acting
![Tony Quinn]()
Tony Quinn
Jack the Barman (uncredited)
Acting