Charlie tells Chelsea that he loves her, but she doesn't respond the way he had hoped, causing him to go to great lengths in order to get her to reciprocate.
An Australian tracker goes to New York City in order to protect his girlfriend, when she is kidnapped by a criminal attempting to keep the adventurer at bay.
A detective hunting the ex-wife of a dangerous drug dealer goes undercover as a kindergarten teacher in order to find and protect his potential witness.
Twins who were separated at birth as part of an experiment to produce the perfect human are reunited when one of them sets out to find his long-lost family.
When Ralph's attractive niece visits, Jack is determined to go out with her and decides to pose as his own identical twin brother, but problems soon arise.
Jack tells a woman that he lives alone and borrows Ralph's apartment to impress her, but things soon take a turn for the worse when she catches him lying.
When Jack finds out that Janet's new roommate is the quarrelsome nurse he had trouble with at the hospital, Jack and Larry play a joke to get rid of her.
When Jack begins to give the wife of Janet's boss weekly cooking lessons, Terri starts to think that he is giving her love lessons and decides to move out.
After a robbery at the flower shop, the police feel Jack is in danger, so a police officer arrives at the apartment and lives with the trio to protect them.
When Terri invites her doctor friend to dinner to help him unwind from the stresses of work, Jack and Janet think that he is a patient of the psychiatric ward.
Jack has plans for a date with Janet, but when Larry offers him a date with "Greedy Gretchen," he lies to Janet about being too tired so that he can go out.
After beginning ballet lessons, Janet is excited to learn that her instructor, Michael, has chosen her for a leading role in one of his upcoming productions.
Evelyn and Chelsea begin spending time together, making Charlie desperate to find a way to keep them apart; Evelyn out-wits Charlie by paying-off Alan and Jake.
Alan goes on a blind date with one of Chelsea's friends, but is shocked to find that the friend is Rose; Charlie is stunned when the two of them hit it off
Charlie reluctantly allows Chelsea to move in, as he mourns the loss of the bachelor pad; Alan and Jake must become acclimated to a woman in the house.
Charlie questions his relationship with Chelsea when he hears that Mia is back; Judith goes into labor and Charlie, Alan, and Herb rush her to the hospital.
Alan is forced into taking care of Judith's baby when his ex-mother-in-law becomes tipsy; Jake blackmails Charlie after he accidentally runs over Chelsea's cat.
Alan takes a job working for Evelyn so that he can eventually move out of Charlie's place; Charlie attempts to close the rift between Chelsea and Jake.
After learning of his connection to Lynda Carter, Alan asks Walden to set the two of them up on a date, leading Walden to invite her to their house for dinner.
Janet has her eye on the bartender at the Regal Beagle, but her poor attempt at matchmaking results in the object of her affection going on a date with Terri.
When Angelino's daughter falls for Jack, he's forbidden to go out with her, and as she becomes more insistent, Jack must convince her that he's happily married.
Jack plans on serenading his girlfriend with a song outside of her apartment, but chaos ensues when he taps on the window of her less attractive neighbor.
When Jack fills in for Angelino's chef, he leaves a lasting impression on a satisfied customer-a mobster who insists on making Jack the permanent chef.