Season 4 - Episode Guide

It's a year from the night Joss encountered a dangerous Wilson and has to relive the painful memory while testifying in court in his murder trial. Despite moving in together, Marc hasn't found a steady job, and April worries Lucy is growing up too fast. Karen is adjusting to motherhood while her attractive male nanny (guest star Jerry O'Connell) makes a seemingly unwarranted advance. Meanwhile, Harry and Joss take the next step in their relationship, but trouble may be ahead as Joss isn't quite healed from her past

Harry's sister arrives for a visit and reveals that all is not well between her and her fiancé. Meanwhile, Joss has trouble celebrating her own engagement; April learns about a painting fellowship; Marc joins a band; and Karen bonds with her male nanny.

Kate soon realizes dating in Los Angeles is a little harder than she expected. Harry has an exciting new job venture while April finally realizes what her passion is with a little help from Marc. The boundaries between Karen and her many, Robert, become complicated. Meanwhile, Joss is still trying to figure out how to deal with the aftermath of the past year.

Karen realizes she's very happy to be back working with her clients again, despite putting her love life on hold. April's new client gets a little too close for comfort, while someone from Marc's past becomes very present. Kate struggles after learning her ex-fiancé is dating someone else, while Joss plays dirty to get a new client.

Karen pitches new book proposals to her agent, Barbara, but she's not impressed with any of them. After an interview with a shock jock host goes awry, Karen decides to stand up for herself, leading to potential consequences. April quits her job after Michael kisses her, but she tells Marc she was fired instead. Later, April discovers the truth about Michael. Joss and Harry have a rocky time trying to balance their new working relationship with Joss, as Harry's publicist and Joss continue to struggle with her PTSD from last year.

Alec visits unexpectedly and disrupts Karen's life with his news. Meanwhile, April and Marc clash on a parenting issue; Kate learns that her new beau has a connection to Joss and Harry; and Harry's business partner invites him and Joss to Las Vegas.

Alec threatens for full custody of Vivian, sending Karen into a panic. April and Marc find a condom in Lucy's jacket, forcing April to give "the talk." Kate doesn't tell Joss and Harry about her new boyfriend, as it could have serious recuperations. Joss' actions put Jonathan's nephew in the hospital and later causes tension in her and Harry's relationship.

April's mom arrives for an overnight stay, but she extends her visit due to health issues. Meanwhile, despite her misgivings, Karen makes an effort to bond with her new nanny; Harry deals with his sudden fame; and Joss learns that Kate is dating Scott.

April's mom causes trouble in April and Marc's relationship. Meanwhile, Karen meets a new guy after Lydia secretly sets up an online dating profile for her; Kate makes a change in her living arrangements; and Joss takes pills to cope with her anxiety.

Marc focuses on his music and bonds with Sofia. Meanwhile, Lydia tries to ruin Karen's new romance; April makes a decision after observing her mother's display of intolerance; and Joss deals with the death of a friend from her impact class.

Despite April trying to win Marc back, he ends things between them for good, but there may be a surprise in store for them. Karen is furious when she finally discovers that Lydia was posing as her online and ends up firing her. Harry juggles two potential business opportunities, but it ends up backfiring. Meanwhile, Joss, along with her impact class friends, goes to find the man who killed their friend and teach him a lesson. After so much fighting, Joss finally tells Harry the truth about a past incident.

April struggles with how to tell Scott she's pregnant; Karen meets Adam's parents.

In the future, Joss and Harry, as well as April and Marc, are happily married and are new parents. Marc takes on the role of an overly concerned, overly attentive parent, while Harry is more hands-off as he tries to navigate how to be a father. Harry's world is turned upside down when he meets Gabe, someone from his past.