First broadcast 7th October 1978.br br Whilst Doyle is on a date with Kathie Mason his flat is robbed and a powerful laser gun which he was given to test is stolen.br br Gordon Jackson - George Cowleybr Martin Shaw - Doylebr Lewis Collins - Bodiebr Cheryl Kennedy - Kathie Masonbr Bryan Marshall - Prestonbr John Stratton - Browniebr Tony Caunter - Maurice Richardsbr Diana Weston - Ruth, CI5 Girlbr Frank Barrie - Martellbr Martin Wyldeck - Jackbr Malcolm Hayes - Forensic Manbr Jeillo Edwards - West Indian Womanbr Maria St.