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

as Detective Inspector Gregory

as Leopold Dryden

as Joan Dryden

as Rodney Fleming

as Julian Caird

as Guy Bannister

as Poppy Levine

as Herbert Evans

as Sydney Parsons

as Sir Herbert Farquharson

as Chief Commissioner

as Hannen Swaffer

as Vernon Bartlett

as Eric Dunstan

as Gillie Potter

as Elisabeth Welch

as Eve Becke

as Gershom Parkington

as Percival Mackey

as Joseph Higgins (uncredited)

as Police Doctor (uncredited)

as Foreigner (uncredited)

as Weisskopf (uncredited)

as Man on BBC Reception Desk (uncredited)

as Detective (uncredited)

as Peter Ridgwell (uncredited)

as Wife's Lover on Broadcast (uncredited)