Alfred Hitchcock Presents, "A Secret Life"

A husband suddenly wanted a divorce when the couple had a good relationship and life. He went away to Mexico and the scene revealed that he had a young lover. The attorney he consulted to, misunderstood his reason to divorce his wife. A private investigator to spying his wife as a reason to divorce her. From the investigator, he knew that his wife had an actor as a company for few times. He rouse his lover anger by acting so weird and worried about his wife. The lover finally said goodbye to him and he replied goodbye as well. He decided to reconcile back with his wife. One day, a friend of his wife who had same physical appearance with her came and she introduced her to her husband. The wife said the friend already helped her in taking care the house during her visit to San Francisco last month. He just realized that the one with the actor was not his wife, it was her friend.