Two schoolboy musicians help to catch a jewel thief
Julie Dawn Cole
Nicola
Dudley Sutton
Raddings
Philip Bliss
Bill
Andrew Bowen
Mike
Simon Thompson
Pitmore
Patrick Jordan
Jones
James Beckett
First Crook
Alfred Maron
Second Crook
John Arnatt
Insp. Mainwaring
Damaris Hayman
Miss Lanyard
