First broadcast 3rd November 1975.
Australian villains Colin MacGruder and Ray Stackpole return to London and steal a bus, posing as its crew.
John Thaw - Regan
Dennis Waterman - Carter
Garfield Morgan - Haskins
Patrick Mower - Colin McGruder
George Layton - Ray Stackpole
Lynda Bellingham - Nancy King
Robert Dorning - Leonard Geisler
Frederick Jaeger - Goldman
Leslie Dwyer - Ted Greenhead
Carol MacReady - Kath
Roger Sloman - Cosby
Frederick Schiller - Austrian Tourist
Gillian Duxbury - Goldman's Girlfriend
Tony Allen - Bill the Driver
Maxwell Craig - Detective
Laurie Goode - Supermarket Manager
Aidan Harrington - Detective
Tony O'Leary - Police Constable
Mike Reynell - Squad Officer
Esme Smythe - Woman on Tour Boat
