Gary ShermanDirector
Donald PleasenceInspector Calhoun
Ron PemberLift Operator
Colin McCormackPolice Constable 1
Norman RossingtonDetective Sergeant Rogers
Clive SwiftInspector Richardson
Jack WoolgarPlatform Inspector
James CossinsJames Manfred, OBE
Hugh ArmstrongThe "Man"
Christopher LeeStratton-Villiers, MI5
Sharon GurneyPatricia Wilson
David LaddAlex Campbell
June TurnerThe "Woman"
Heather StoneyW.P.C. Alice Marshall
Hugh DicksonDr. Bacon
Gary WinklerPolice Constable 2
James CullifordPublican
Suzanne WinklerProstitute
Gerry CramptonTunnel Worker
Gordon PetrieTunnel Worker
Terry PlummerTunnel Worker
