Season 4

Lucy and her son Jerry arrive in LA (her daughter has gone to bording school, and Vivian has gotten married, it is explained), where, coincidentally, Mr. Mooney has also relocated to. Lucy coerces Mr. Mooney into taking her and Jerry to Marine Land, where Lucy ultimately ends up in the pool with the dolphins.

Lucy babysits a neighbor's horse.

Mr. Mooney instructs Lucy to deliver some documents to Danny Thomas, and through a series of misunderstandings, she ends up performing in his musical act.

Lucy Carmichael's 1st Christmas in California. Part 1 has Lucy expressing determination not to spend too much on presents & Christmas tree in a typical tete a tete with a dubious Mr. Mooney. She succeeds in mixing up all of Mr. Mooney's gift tags for his wrapped Christmas presents. Part 2 takes place as Lucy shops for a Christmas tree withe the scene ending with Lucy knocking lots of the inventory over with her new large tree. Part 3 has her recruit Mr. Mooney to sing bass with the children's choir at a charity event at the bank.

Lucy sets out to track down her boss, Mr. Mooney, who is enjoying a secret vacation at a dude ranch. Lucy's mission is to obtain Mr. Mooney's signature on some important documents. However, she mistakenly finds herself on an Indian reservation, where she bears a striking resemblance to the rain goddess depicted on the tribe's totem pole.

As a contestant on Art Linkletter's television show, Lucy is challenged to remain silent for 24 hours, with the promise of a $200 reward if she succeeds. However, Linkletter sends another audience member named Ruth, who is actually a plant from the show, to get her to break her silence.

Lucy takes on a part-time job at a department store to earn money for a dinette set she intends to purchase. However, her day at the store becomes a series of comedic misadventures.

Mickey Rooney comes to the bank to secure a loan to purchase an acting school, and finds himself inadvertently enrolling his loan officers, Mr. Mooney and Lucy, as his students. As the three of them embark on their acting adventure, the episode pays homage to silent movie comedies.

Lucy takes matters into her own hands when her favorite actor friend faces being written out of the beloved soap opera, Camden Cove. Determined to help her friend, Lucy employs various disguises and strategies to influence the outcome of a pivotal trial in the show.

Lucy, an avid movie fan, seizes an opportunity to attend a major Hollywood movie premiere by posing as a theater usher. Her love for films and celebrities leads her to create chaos as the stars arrive on the red carpet. Her overzealous behavior captures the attention of the crowd and draws the ire of some of the stars... and a gorilla.

Lucy is set up on a date with Dean Martin's stunt double. When the double can't make it, Dean himself substitutes on the date. During the date Lucy keeps telling him how bad it is that Dean Martin is stealing all of his glory.

Bob Crane visits the bank where Lucy works to open an account. However, their encounter takes an unexpected turn when Lucy ends up securing a dinner date with him. Coincidentally, the bank has invested in Bob's upcoming World War I film, and Lucy's boss, Mr. Mooney, happens to know the director. Mr. Mooney, for his own amusement and to irritate Lucy, guarantees that Iron Man Carmichael, a stuntman, will perform stunts for the movie.

Lucy finds herself assisting an inventor friend in obtaining funding for his projects. To achieve this, she comes up with a plan involving Mr. Mooney, her boss. Mr. Mooney agrees to provide financial support if Lucy and her friend can help him deal with his troublesome 13-year-old nephew.

Lucy takes it upon herself to surprise her boyfriend, Frank, by knitting him a sweater. Secretly taking his measurements, she stays up all night diligently crafting a red sweater for him. However, her efforts result in an oversized creation that could easily cover a car. To make matters worse, Lucy discovers that Frank despises the color red.

Federal agent Stack discovers that Lucy is a dead ringer for gangster Gordon's moll and gets her to go undercover in order to recover missing bank robbery loot. This episode was a spoof of the classic crime drama The Untouchables which was produced and filmed at Desilu Studios.

When a heavy computer accidentally falls on Mr. Mooney's foot, with a burst of adrenaline Lucy finds herself able to lift the massive machine on her own, exhibiting superhuman strength. Surprisingly, her adrenal gland remains "on," leaving her with an ongoing power that grants her incredible abilities. However, Lucy's newfound strength comes with a downside. Her superhuman power proves to be uncontrollable, causing unintentional destruction wherever she goes.