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