Bewitched (1964)

S06E26 A Chance on Love

Mr. Dinsdale, a charming and attractive client, becomes infatuated with Samantha due to her striking resemblance to Serena. In her attempt to clarify the misunderstanding, Samantha inadvertently causes Darrin to lose his business account. The situation takes a turn when Dinsdale witnesses Samantha and Serena together, leading him to realize the truth about his feelings.