First broadcast 13th February 1975.
Regan adopts a new identity as an ex-con and goes undercover as a truck driver to expose a hijacking ring.
John Thaw - Regan
Dennis Waterman - Carter
Garfield Morgan - Haskins
Stanley Meadows - Harry Poole
Susan Tracy - Fran
Tony Steedman - Andrew Barkis
Marjie Lawrence - Mrs. Harris
John Forgeham - Dennis Rawlins
Carl Rigg - Det. Sgt. Kent
Robert Russell - Arni
Jeremy Young - Wren
Terry Cowling - Kesey
William Moore - Det. Sergeant Bowyer
Mollie Maureen - The Old Woman
Tony Allen - Bill the Driver
Walter Henry - Detective
Lew Hooper - Policeman
Robin Scott - Photographer
Trevor Wedlock - Flying Squad Officer
