First broadcast 17th November 1975.<br /><br />An armed gang kidnap telephone engineer Ronald Peters and hold him in an empty house, using his expertise to trigger off false alarms in some banks, diverting the police whilst the gang rob alarm-free premises.<br /><br />John Thaw - Regan<br />Dennis Waterman - Carter<br />Garfield Morgan - Haskins<br />Robert Swann - Det. Sgt. David Keel (as Robert Swan)<br />Myra Frances - Dr. Liz Keel<br />Christine Shaw - Kathy Peters<br />Andonia Katsaros - Annie Clark<br />Leslie Schofield - Ian Ross<br />David Belcher - Police Inspector<br />Shaun Curry - Ronald Peters<br />Malcolm Kaye - Brian Slater<br />Alan Brown - The Consultant<br />Roy Sampson - Uniformed Constable<br />Bobby Collins - Young Boy<br />Tony Allen - Bill the Driver<br />John Cannon - Armed Officer<br />Ron Gregory - Radio Officer/Armed Officer<br />Bill Hibbert - Flying Squad Member<br />James Muir - Armed Officer<br />Byron Sotiris - Constable<br />Bill Wallis - 'Mummy' (voice) <br />Bill Westley Sr. - Constable
