When a handsome truck driver is turned down for a loan, she convinces him to enter a Robert Goulet look alike contest in order to win the needed cash.

Mr. Mooney orders Lucy to dress up as an elderly woman and escort the aging bank president to the annual banquet. The old man would rather chase Lucy around his living room.

Lucy tries to convince Jack Benny to take his money from his underground vault and deposit it in Mr. Mooney's bank. She plans to do so by designing even more elaborate precautions than Benny's own booby-trapped passages.

A young man wants a career in the music, but his uncle insists he learn the banking business. Lucy arranges for an impromptu audition with a record producer in the bank's lobby.

A European movie company fronted by a famous French movie actor comes to Los Angeles to set up shop. Mr. Mooney's plans to land their account are nearly scuttled when Lucy becomes inebriated on French champagne.

Lucy convinces Mr. Mooney that she's too ill to come to work so she can go to a department store sale. After examining some of the items for sale in the store (and causing a lot of damage), she learns she is the ten-millionth customer and wins many valuable prizes. One prize she wins isn't one to her liking - her photograph will appear prominently in the next day's morning newspaper. Lucy goes to great lengths to make sure that her boss doesn't see the incriminating photograph and fails miserably.

Lucy moonlights as Milton Berle's secretary. She overhears Milton rehearsing a torrid love scene, thinks that the comedian is cheating on his wife and plots a suitable comeuppance.

Mr. Mooney gives Sheldon Leonard permission to shoot a bank robbery scene after hours for an upcoming TV series pilot, but Lucy and Mary Jane think the heist is the real thing and attempt to prevent it.

When Mr. Mooney's boss threatens to fire him because his bank branch hasn't had many new accounts, Lucy tries to convince millionaire country singer Homer Higgins to deposit his money with the bank.

Lucy is accused of being the notorious red-haired shoplifter who has been victimizing area stores.

Mr. Mooney and Lucy travel to a quaint small town to loan the mayor money to build a highway right down Main Street. When they arrive, they are greeted with intense opposition and Lucy decides to join the anti-highway townspeople fight the new road.

Mr. Mooney bets Lucy that she can't find other employment and last for entire day. If Lucy wins the bet, Mr. Mooney will rehire her and give her a raise.

Viv flies to California to visit Lucy and admits that she's looking for a young college student from her hometown whom she believes has fallen in with the no-good beatnik crowd. Lucy and Viv disguise themselves as hippies to track the youth down.

Lucy is preparing to go on vacation, but she has a change of heart when her substitute secretary turns out to be an attractive blonde who Mr. Mooney really likes. Lucy secretly doesn't go on vacation, and spies on them in various disguises.

An overbearing efficiency expert threatens to change the way Mr. Mooney runs his bank branch.

Mary Jane warns Lucy that the long hours she's putting in at the office could lead to hallucinations. Later, when she a monkey appears and apparently disappears in Mr. Mooney's chair, she begins to think she's loosing her mind and consults a psychiatrist.

Lucy enters a dog food jingle contest and wins the grand prize: a trip to London, England. She packs her ticket in her luggage and misses her plane and finds herself seated next to Mr. Mooney on the next flight.

In order to cut down on expenses, Lucy advertises for a roommate, selecting the shy Carol Bradford. In order to get Carol to come out of her shell, Lucy and Mary Jane throw a party and invite a group of musicians to perform.

Lucy calls in sick so she can join her roommate at a Palm Springs resort. Unfortunately, her boss, Mr. Mooney, is staying at the same hotel.

When a letter arrives from the US Government, Lucy finds that she's mistakenly been drafted. Instead of "Lucy," the letter is addressed to "Lou C." She sets off to the draft office to correct the mistake, but due to stupid "rules and regulations," Lucy finds that she has to become a Marine until the paperwork gets straightened out. She proceeds to make life miserable for her sergeant.

Mr Mooney sends Lucy to deliver some papers pertaining to the financing of John Wayne's latest production. Despite his orders to drop off the papers with one of the studio's secretaries, Lucy insists on meeting Mr. Wayne in person at lunch and spills ketchup all over him. She then trails him to his movie set and causes all sorts of havoc.

Lucy and Mary Jane meet Pat Collins, a celebrity hypnotist, at a fashion show and are invited to her night club performance. When Lucy learns that Mr. Mooney is suffering insomnia, she insists she come to the program in the hopes that he'll become more relaxed why under the hypnotist's spell.

When Mr. Mooney refuses to co-sign Lucy's loan for new furniture, she launches an elaborate scheme to win the money from a company manufacturing beans.

Lucy arranges for ventriloquist Paul Winchell to entertain at the annual banker's banquet, but gets in hot water when she leaves his dummies in the taxi cab outside the banquet hall.

Lucy tries on an expensive ring Mr. Mooney had made for his wife, it looks like the bank manager won't be able to give his spouse the anniversary present - it gets stuck on Lucy's finger.

After Lucy drives off the plumber with her meddling, she and Viv decide to finish installing the shower stall, with disastrous results.

When one of the members of Viv's female barbershop quartet drops out, Lucy convinces Viv and her friends to let her fill the vacant spot. Lucy takes singing lessons to learn to stay on key, but her instructor can do nothing for the stage fright that seizes the redhead when she learns that the groups first performance will be in front of three thousand people.

When visiting the bank as a customer, George Burns finds out that Lucy is instinctively funny and asks her to become a partner in his show. Mr. Mooney, who thinks this is an opportunity to get rid of her, accepts being her agent. The show opens in Santa Monica, where the new pair appear in a Burns and Allen-style act. George Burns is the straight man and Lucy the comedienne, who delivers the punchlines.

Mr. Mooney leaves the office for two weeks of training in the Naval Reserve, but forgets to sign some important papers. Lucy tracks him to the submarine on which he will sail on maneuvers and, dressing as a sailor boards the ship in an attempt to get him to sign the document. The submarine leaves for sea before Lucy can leave the vessel and she's forced to pretend that she's just another sailor.