I Love Lucy S05E04 - Ricky Sells the Car

Ricky sells the car and buys train tickets for the trip back to New York, but he forgets about Fred and Ethel, leading to a rift between the friends. After Lucy informs Ricky of his error, he is able to buy tickets for the Mertzes, but Lucy worries when she finds out that the tickets are not the same class as theirs.