Engineer Hartley is a character from the The Secret Service episode A Question Of Miracles. He is a saboteur who managed to infiltrate the New York based American Desalination Company, who were about to buy a British made desalination plant. Engineer Hartley urged the Vice-President of the company to cancel the order, after the British plant in North Africa exploded after only 250 hours in service. When this failed, he boarded a submarine with two helpers, and attempted to blow up the desalination plant at Port Trennick.
Hartley was voiced by Keith Alexander.