Bewitched (1964)

S8E13 Three Men and a Witch on a Horse

Endora casts a spell that turns Darrin into an eager gambler. Frustrated, Samantha demands that Endora reverse the enchantment. Instead, Endora complicates matters by having Darrin place bets on a horse named Fancy Dancer, which is destined to lose. Darrin convinces Larry and a client to wager everything on this ill-fated horse. Desperate for a win, Samantha visits the stables to plead with Dancer to perform well for Darrin and his friends. Against all odds, Dancer surprises everyone by winning the race!