
An actor is murdered live on air whilst a play is being broadcast. Everyone in the play and broadcasting house fall under suspicion.

Detective Inspector Gregory

Leopold Dryden

Joan Dryden

Rodney Fleming

Julian Caird

Guy Bannister

Poppy Levine

Herbert Evans

Sydney Parsons

Sir Herbert Farquharson

Chief Commissioner
Hannen Swaffer
Vernon Bartlett
Eric Dunstan
Gillie Potter
Elisabeth Welch
Eve Becke
Gershom Parkington
Percival Mackey

Joseph Higgins (uncredited)
Police Doctor (uncredited)
Foreigner (uncredited)

Weisskopf (uncredited)

Man on BBC Reception Desk (uncredited)
Detective (uncredited)

Peter Ridgwell (uncredited)
Wife's Lover on Broadcast (uncredited)

Director
Director of Photography
Art Direction
Editor
Costume Design
Adaptation

Novel
Assistant Director
Sound Recordist
Production Supervisor
Novel
Music Director
Original Music Composer