One for the Road Alfred Hitchcock Presents : Season 2 Episode 23

Marcia Hendrix finds out that her husband Charles has been cheating on her with a woman named Beryl Abbott. She tries to poison Beryl by putting poison in her sugar bowl. When she goes home she discovers that that her husband has gone to Beryl. Not wanting to kill him, she goes to Beryl and tells her of the poison. Beryl says that Charles has already taken the poison. Marcia leaves to find a doctor. Charles comes in from another room. Not knowing the muder plot but knowing that his wife knows about Beryl, Charles decides to end the affair. Before leaving Beryl asks him to have some coffee for the road. He do so and helps himself to some sugar.