After Lucy buys a share of stock in the Danfield bank, she feels it is her job to help Mr. Mooney land the account of a wealthy psychiatrist who specializes in hypnosis. So Lucy and Vivian reach out to get the town's wealthiest doctor to become a depositor in Mr. Mooney's bank.
The doctor, mistaking the girls for volunteers for an experiment in hypnosis, regresses them to the age of five. Soon Lucy, Viv, and Mr. Mooney end up pretending to be hypnotized, and all acting as children.
Special Notes: This is the last episode where Lucy, Viv, and Mr. Mooney all have a chance to be funny together. The supporting cast are all "Lucy Show" regulars.