Randall and Hopkirk (Deceased) (1969)

The Ghost Who Saved the Bank at Monte Carlo (1x11)

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Marty's aunt Clara has spent five years perfecting a ""system"" that guarantees a win at roulette. She hires Jeff and Jean to escort her to Monte Carlo as ""bodyguards"". They have plenty of work to do: three different groups of people seem to be after Aunt Clara and her ""system"".