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Ben Cartwright purchaeses a stallion from drunken lout Burt Loughlin (Tom Tully), hoping to fulfill the fondest dreams of Burt's sweet daughter Trudy (Kim Darby). It is Trudy's wish to ride the stallion to victory in a upcoming high-stakes race. But Ben's good intentions may be undone by Burt, who has aligned with crooked gambler Harper (William Bryant) to fix the outcome of the race. Written by Sydney Ellis and Robert Vincent Wright, "The Sure Thing" was originally telecast on November 12, 1967.