This is a feature-length compilation of three short episodes taken from a TV series called 'Colonel March of Scotland Yard' (1954-56, 26 episodes) starring Boris Karloff as Colonel March, head of Scotland Yard's Department D.3, otherwise known as The Bureau of Queer Complaints.
Cy Endfield
Director

Boris Karloff
Colonel March

Ewan Roberts
Inspector Ames

Joan Sims
Marjorie Dawson

Richard Wattis
Cabot

Sheila Burrell
Joan Forsythe

Anthony Forwood
Jim Hartley

Ronald Leigh-Hunt
Ireton Bowlder

Patricia Owens
Betty Hartley
John Hewer
John Parrish
Trap House66%
The International62%
The Verdict65%
Suburbicon58%
Overdrive61%
Black Site60%
All the Devils Are Here61%
God Is a Bullet61%
The Blue Gardenia65%
Inside Man60%
The System71%
The Losers62%
Striking Distance59%
The Rookie59%
Kill 'em All 267%
Absolution59%
A Crooked Somebody63%
The Thursday Murder Club65%
Reasonable Doubt58%
American Murderer59%