Three kids get mixed up with jewel thieves and stolen diamonds in a 24-hour road rally.
Peter Firth
Robert 'Bobby' Stewart
George Sewell
Henry Stewart
Patrick Allen
Insp. Cook
Derek Newark
Mercer
Dudley Sutton
Finch
Barry Jackson
Wheeler
Christopher Malcolm
Jock
Edwin Richfield
Richard Wattis
Sir Hilary Stanton
Ambrosine Phillpotts
Lady Truesdale
Allan Cuthbertson
Gus Ashley
Arthur Hewlett
Benjy
Spencer Banks
Charlie Todd
Cynthia Lund
Susan Stewart
