Guest Stars Jerome Willis as John Irvine John Moore as Dr. Kendal Vanessa Thornton as Miss Guthrie William Dexter as Supt. Hartley Michael Hawkins voices George Chalmers Keith Pyott as Asst. Commissioner Lucas Barrie Cookson as Dr. Howard John Garvin as Jim Thurgood Rosemary Miller as Joan Thurgood Ronald Wilson as Det. Sgt. Grant Bruce Beeby as Commander Delabo Yvette Rees as Mrs. Chalmers Charles Bird as Police Sergeant
