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
Eleanor Summerfield
John Salew
Paul Carpenter
Geoffrey Keen
Ann Hanslip
Fred Johnson
Martin Boddey
Arthur Lane
Paula Byrne
Leo Phillips
Freddie Tripp
Frank Birch
Jeremy Hawk
James Carney
Melvyn Hayes