When the detective in charge of investigating a series of bank robberies starts to get too close to the culprits, they set up a blackmail scheme to warn him off. But when the crooks begin to fall out with each other, the police learn the truth.

Nigel Patrick
as Chief Insp. John Edward Johnnoe

Katherine Woodville
as Mary Johnnoe

Colin Blakely
as Charlie Ruskin

Derren Nesbitt
as Bertie Hoyle

Harry Andrews
as Supt. Alec Bestwick

Roy Kinnear
as Shorty

Margaret Whiting
as Maisie Barton

John Cowley
as Jim Ruskin

Allan Cuthbertson
as Smythe

Frank Finlay
as Leon Sale
CinemaSerf
Nigel Patrick is effective as a Scotland Yard chief inspector on the trail of a sophisticated gang responsible for a Whitechapel bank robbery. "Johnnoe" is getting close. His meticulous, no-nonsense, style of investigation is leading him close to Frank Finlay's "Sale" whom we know from the outset is...