Randall & Hopkirk (Deceased) S01E19 - A Sentimental Journey

Sam Seymour hires Jeff to go to Glasgow and retrieve a valuable 'item'. This turns out to be his girlfriend Dandy Garrison, who has a case chained to her wrist. On arrival back in London Dandy disappears, fitting Jeff up to appear to be her accomplice. In reality she has gone off with Tony, one of Seymour's men and they have stolen a very valuable stamp. Dandy tries to double-cross Tony as well, by escaping in a private plane but Marty brings her down to earth.