When the guys have differences that they can't seem to resolve, Holly suggests couples therapy for them. But her move backfires when it becomes apparent that she is the cause of their problems.

The gang's relationships are thrown out of whack when it is discovered that there is more to Stuart than originally thought.

Chopin, the dog that Stuart lost custody of in his divorce, stays over. Phil then accidentally switches the dog with a look-a-like, after having a one night stand with another dog owner. Holly suspects that Eden is having an affair with their married boss, Mr. Hubner (James Morrison), and is even more convinced when she discovers that Eden is pregnant.

Phil's desire to sign top mixed martial arts fighter Tommy Dunbar (Craig Gellis) as a client has the guys all attending a strip club, which lands Stuart in the hospital. Meanwhile, Eden buys Holly a new bra, which provides surprising benefits.

Holly starts to hear her biological clock ticking, so the guys help in her search for a sperm donor.

Holly's continuing crush on her co-worker Paul, makes her determined to find out how he feels about her. Meanwhile, frustrated with being the only roommate who cleans the apartment, Stuart hires a maid who begins to disrupt Haskell's life.

Holly flaunts her new boyfriend, Paul, and Paul invites the roomates to a great party. But Stuart sees signs that Paul may still be too close to his ex-wife.

With her mother, Majorie (Judith Light), and sister, Jill (Amanda Detmer), in town, Holly tries to impress her "perfect" sister by creating a new identity. Meanwhile, the guys are enamored by Stuart's cooking.

A professional tennis player and ladies man (Zach Braff) is in town, but he turns out to be more of a man's man instead.

The gang crashes a party on Phil's boss's yacht; a very pregnant Eden goes into labor.

In the wake of Haskell declaring his love for Nicki, Holly tries to play cupid. Stuart secretly arranges for Phil to get together with his high school crush.

Holly represents Nicki in her divorce, but lets her own history with marriage get in the way. Phil tries to prove he’s not getting older by dating a much younger woman.

Holly joins a grief support group to meet a man. Stuart and Haskell help prepare Phil for a talk show appearance after he develops a lisp.

Phil is convinced that the woman Haskell is dating is really a man. Stuart feels guilty after sleeping with a woman who thinks that he is a war hero.

Haskell’s estranged brother shows up and asks for one small favor: his kidney. Holly mentors a teenager who turns out to like Eden’s job more than hers.

Holly throws a birthday party for Stuart and Nicki, but her real motive is to impress a guy she's just met who's new in town. Nicki and Stuart's dad shows up and ruins everything.

Haskell plans to attend a big event honoring him for his past bowling glory, but is quarantined with Phil and Stuart. Holly secretly rewrites Eden's college paper and almost destroys her dream.

The gang attends a charity silent auction. Haskell wins a police ride-along. Phil wins dinner with his favorite sitcom TV Mom. Stuart and Holly are forced to share a cooking lesson with a celebrity chef.

Holly sneaks into a sorority Eden is pledging to find out why she was rejected years ago. Haskell turns the guys' apartment into a pretend AirBnB to attract a woman.

Stuart and Holly convince Margo to hold her wedding at the restaurant; Haskell tries to stop Margo's wedding.