The Partridge Family (1970)

S3E4 Each Dawn I Diet

Danny is eager to shed some pounds to catch the attention of a girl he likes. Shirley steps in and puts him on a strict diet. However, after a week, Danny finds he’s actually gained weight due to his sneaky indulgences. Ruben can't resist poking fun at Danny's lack of self-control, which leads them both to confront their bad habits—Danny's unhealthy eating and Ruben's smoking.