The dark green car in the garage being tuned is clearly registered '22 XKX' and on the front windscreen says Hart Racing with an Aston Martin owners club sticker. The car is an Aston Martin DB4 GT Zagato.
Anna Wing (Mrs. Haldane) previously appeared with John Thaw in The Proper Charlie (1966). She later became best known for playing Lou Beale in EastEnders (1985) from 1985-1988.
Jan Harvey (Pat Knightly) later appeared with John Thaw in Greeks Bearing Gifts (1991). She also later appeared with Dennis Waterman in Meat Is Murder (2009)