YouTube reviews:
Trailer:
Choice dialogue:
Doctor Adam Royston [Dean Jagger]: “For the time being, let’s not conjure up visions of nameless horrors creeping around in the night.”

Peter Elliott [William Lucas]: “It was like something out of a nightmare, it was horrible!”

Major Cartwright [John Harvey]: “The trouble was some of these scientific types is they can’t see the easy way out of anything. It’s got to be complicated if it’s going to work.”
Cast and characters:
Dean Jagger … Doctor Adam Royston
Edward Chapman … John Elliott
Leo McKern … Insp. ‘Mac’ McGill
Anthony Newley … LCpl. ‘Spider’ Webb
Jameson Clark … Jack Harding
William Lucas … Peter Elliott
Peter Hammond … Lt. Bannerman
Marianne Brauns … Zena, the Nurse
Ian MacNaughton … Haggis (as Ian McNaughton)
Michael Ripper … Sgt. Harry Grimsdyke
John Harvey … Maj. Cartwright
Edwin Richfield … Soldier Burned on Back
Jane Aird … Vi Harding
Norman MacOwan … Old Tom (as Norman Macowan)
Neil Hallett … Unwin (as Neil Hallet)
Kenneth Cope … Sapper Lansing
Michael Brooke … Willie Harding (as Michael Brook)
Frazer Hines … Ian Osborn (as Fraser Hines)
Edward Judd … 2nd Soldier (uncredited)