All Cast
Donald Pleasence
Inspector Calhoun
Norman Rossington
Det.Sgt. Rogers
David Ladd
Alex Campbell
Sharon Gurney
Patricia Wilson
Hugh Armstrong
The "Man"
June Turner
The "Woman"
Clive Swift
Inspector Richardson
James Cossins
James Manfred O.BE.
Heather Stoney
P.C.W. Alice Marshall
Hugh Dickson
Dr. Bacon
Christopher Lee
Stratton-Villiers, MI5
Jack Woolgar
Platform Inspector
Ron Pember
Lift Operator
Colin McCormack
Police Constable 1
Gary Winkler
Police Constable 2
James Culliford
Publican
Suzanne Winkler
Prostitute
Gerry Crampton
Tunnel Worker
Terry Plummer
Tunnel Worker