Hank completes his biography of Ashby; Charlie is reduced to working at a car dealership; Sonja gives birth; Karen accepts a job offer back home in New York, forcing Hank and Becca to make painful choices.

Ashby hosts a party to celebrate the publication of Mia's book; Charlie announces to Marcy, who has just completed rehab, that he wants a divorce; Becca is devastated to catch Damien cheating on her.

Hank nervously awaits medical test results while reflecting on the early days of his romance with Karen, which coincided with a famous grunge rocker's overdose; Charlie begs Daisy not to move out.

Hank declines an offer of sex, while Karen goes on a date with Ashby; Charlie and Daisy bond over "Dirty Dancing" while Marcy remains on the mend in rehab.

Hank tries to get the truth about Ashby from his former flame, while Karen confronts the record producer about his relationship with Mia; while Marcy detoxes at her mother's house, Charlie succumbs to temptation with house guest Daisy.

Hank meets an attractive new love interest in Becca's English teacher, but it turns out she's also the mother of Becca's boyfriend; Charlie discovers that Marcy has been hiding a financially devastating secret.

Hank sets out to track down Lew's long-lost first love, and discovers that Sonja and her self-help guru boyfriend Julian have an "open" relationship; Mia spends a day trailed by a "Rolling Stone" reporter; Charlie's house becomes a porn set.

The newly-single-again Hank moves into Lew's mansion, where his host arranges a sexual encounter for him with an annoying celebrity chef; Charlie becomes a major investor in his newest client's upcoming porn movie.

Hank and Karen's dinner party is derailed by Hank's botched marriage proposal to Karen, the revelation that Hank is likely the father of their friend Sonja's baby, and Lew's near-death from an allergic reaction to sushi.

Hank's first day as Lew Ashby's biographer is complicated when a hooker acquainted with both men claims that Hank is better in bed; Karen comes under the spell of a self-help guru; Charlie pitches himself as agent to a porn actress.

Hank befriends a legendary record producer in jail and considers writing the man's biography; Charlie loses his job when his scheming former assistant Dani betrays him to the agency president.

Hank and Karen make plans to move back to New York now that they've reconciled, but their plans unravel thanks to a series of drunken incidents that land Hank in jail and in trouble with Karen.