A famed trumpet player is suspected of murdering a blues singer. Using only two minor clues, he narrows the suspects to four people, but only after surviving poison placed on the mouthpiece of his trumpet!
Alex Nicol
as James Bradley
Eleanor Summerfield
as Barbara Quigley
John Salew
as Maxie Margulies
Paul Carpenter
as Johnny Sutherland
Geoffrey Keen
as Maurie Green
Ann Hanslip
as Maxine Halbard
Fred Johnson
as Det. Sgt. MacKenzie
Martin Boddey
as Insp. Mulrooney
Arthur Lane
as Jeff Colt
Paula Byrne
as Gloria Lewis Colt
Leo Phillips
as Dresser
Freddie Tripp
as Stage manager
