Casts
Kieron Moore
as Cmdr. Michael Haydon
Lois Maxwell
as Kim Hamilton
Donald Wolfit
as Prof. Merrity
Bryan Forbes
as Jimmy Wheeler
Jimmy Hanley
as Larry Noble
Walter Hudd
as Professor Blandford
Donald Gray
as Captain Ross
Ronan O'Casey
as Reporter
Robert O'Neil
as Reporter
Alan Gifford
as Colonel Galloway
