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.

Holly & Haskell go on a practice date. Stuart tries really hard to fit in with Phil's friend and embarrasses him in the process.

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.