Mom (season 4)

Adam surprises Bonnie by returning home early. Not wanting to kick the renter out of his home yet, Adam stays at Bonnie's apartment and the two start to discover each other's personal flaws. Meanwhile, Jill agrees to play "wingman" for Christy at a different AA meeting where there are lots of attractive single men, but Jill's jealousy leads her to sabotage Christy and nearly ruptures their entire friendship.

Jeanine (Rosie O'Donnell) speaks at the ladies' AA meeting and later visits with Bonnie and Christy. Upon learning that Christy is stressed over juggling two jobs, four college classes and kids, Jeanine suggests she quit school and her current jobs to work at her real estate firm. Though Christy finds the offer tempting, she ultimately decides to stay in school. Meanwhile, Adam is fascinated to learn that Bonnie had a brief lesbian relationship with Jeanine, and he has many questions.

When Adam wants to get high before having sex with Bonnie, Bonnie thinks it means she has become undesirable. It turns out that something entirely different is at work.

Christy is furious when Baxter and Candace take Roscoe home with news that they caught him smoking marijuana, and angrier when Candace says it's Christy's fault. Christy is sure Roscoe got the weed from Baxter's stash, but after Baxter falsely claims he's given it up, Bonnie later finds a way to get even with Baxter in exchange for a Hawaiian vacation. Also, Christy has a video chat with Violet who claims to be very happy with her job in Lake Tahoe, but Christy sees through it.

Special guest stars: Sadie Calvano as Violet, Matt Jones as Baxter and Blake Garrett Rosenthal as Roscoe

Absent: William Fichtner as Adam

After rescuing a sick Violet stricken with mono, Christy and Bonnie try to get to the bottom of the story of what truly happened and find out Violet has gotten into some serious trouble. However, Violet surprises everyone by getting back together with Luke.

Special guest stars: Sadie Calvano as Violet and Spencer Daniels as Luke

Absent: Jaime Pressly as Jill, Beth Hall as Wendy and William Fichtner as Adam

Still reeling from learning of Roscoe's using pot and drinking, Christy never lets her son out of her sight, even taking him to a meeting and later getting mad at Adam for drinking beer in front of Roscoe. Bonnie gets through to Christy via an Al-Anon meeting and Christy faces her pain and fear head-on.

Special guest stars: Matt Jones as Baxter and Blake Garrett Rosenthal as Roscoe. This was Rosenthal's final appearance on the series.

On the 20th anniversary of her mother's suicide, Jill falls into a depression. Marjorie gets her out of it by making her volunteer at a soup kitchen, but the group is shocked when Jill decides she wants to have a baby. Christy tries to talk Jill out of it, but does so in a way that leads Jill to say "I never want to speak to you again."

Absent: William Fichtner as Adam

While Bonnie and Christy look for a gift for Jill, the bitchy clerk at the posh boutique subtly pokes fun at their socioeconomic status, causing Christy to steal a pair of Prada sunglasses in anger. Bonnie chastises Christy for her criminal behavior, but she then uses Adam's handicap placard to get a good parking space at a convenience store, leaving both women to make amends.

Bonnie is excited to meet Adam's best friend Mitch (Bradley Whitford) and his wife Leanne (Nicole Sullivan) who are coming to town to visit Napa wine country. But the two turn out to be hardcore partiers and never leave Bonnie's place after getting stinking drunk. Leanne also reveals that she slept with Adam multiple times before she met Mitch, something Adam never told Bonnie.

Christy is hurt to be frozen out of Jill's pregnancy news as their friendship remains sundered ahead of her birthday. A day later, Jill has a miscarriage and Christy goes to apologize but is turned away. With some help from Bonnie, Christy and Jill mend fences with each other.

Absent: William Fichtner as Adam

Christy meets a handsome man named Nick Banaszak (Chris Pratt) outside the ladies' diner, and learns that he is Marjorie's nephew. Despite Marjorie forbidding any of the women to date Nick, Christy pursues him and later regrets it because Nick is, well, a very special person.

Absent: William Fichtner as Adam

Bonnie steals some cookies from Adam's place and shares them with Christy. The two become high, and later share the cookies with Jill and Wendy after an AA meeting. A panicked Adam contacts Bonnie to tell her the cookies contain marijuana, causing all of the women to worry over losing their sobriety and call Marjorie for help.

When hung-over Adam decides to spend Saturday in bed, a fed-up Bonnie goes to their scheduled wine and cheese festival alone and meets Joe (David James Elliott), a local restaurateur. The two immediately have a romantic connection, forcing Bonnie to hide the truth from Adam.

After Adam breaks up with her following a kiss from Joe, Bonnie finds herself in a stupor. When her attitude becomes too much for the girls to handle, Christy hopes that Adam will reconsider a future with her mother. Bonnie and Adam awkwardly resume "dating" with all sex and no communication, and Bonnie gathers her courage to tell Adam they need to stop because things are still bad between them.

Bonnie and Adam get back together for real, alternately having raucous sex and loud arguments. One argument is over Adam responding to a text from his ex-wife during sex, and he later admits to Bonnie that he's still trying to get his ex to sign divorce papers. Bonnie confronts the ex, Danielle (Wendie Malick), and surmises she is still hoping to get back together with Adam.

Christy and Adam get into a car accident, and Bonnie's feelings are hurt when she discovers she is not the emergency contact for either of them. With Bonnie having to take care of Christy as she recovers from a concussion, she reluctantly agrees to let Danielle take care of Adam, who has a shoulder injury. Jill also puts her plans to be a foster parent to a test by (poorly) tending to Christy during her recovery.

Despite feeling like she blew her interview with the foster system administrator, Jill gets a call that they have a child for her. Expecting an infant, Jill learns the child is a 14-year old named Emily (Julia Lester), who has bounced around the system. Meanwhile, Bonnie learns the apartment complex management has asked the tenants to give her performance reviews, so she gets to work in fixing their accurate--meaning abysmal--views of her work as the manager.

Absent: William Fichtner as Adam

Following the death of Shirley, Bonnie's mother, Christy and Bonnie discover that she kept a very big secret: she had a son with a different father. Bonnie is further annoyed when she meets her half-brother Ray (Leonard Roberts) and learns that he is a successful lawyer. But a tip from Jill allows Bonnie to find some peace of mind.

Absent: William Fichtner as Adam
Note: Allison Janney submitted this episode for consideration due to her nomination for the Primetime Emmy Award for Outstanding Lead Actress in a Comedy Series at the 69th Primetime Emmy Awards.

Christy annoys everyone when she adopts her new boyfriend Brad's (Bret Harrison) healthy lifestyle, and Bonnie and Adam decide to take the next step in their relationship.

When Marjorie takes a break from the group, Bonnie becomes the go-to for everyone's problems. Christy is hit by emotional trauma when she recognizes a new AA member as the man who once raped her.

Absent: William Fichtner as Adam

Christy and Jill take Emily to meet her biological mother Natasha (Missi Pyle) in a rehab facility. Christy is shocked when she sees Natasha, remembering her from her days as a stripper, and starts helping Natasha deal with her large array of self-inflicted problems. Meanwhile, Bonnie has to take care of Adam's ageing dog while he attends a funeral in Hawaii.

Bonnie learns that the IRS has tracked her down and is demanding $18,000 in unpaid taxes. After dismissing Adam's offer to pay the debt, Bonnie tries to hire Steve Casper, then asks Christy to represent her. They eventually go to Bonnie's half-brother Ray for help. After Ray is able to work out a deal with the IRS, he states to Bonnie, Christy and their friends that he has a cocaine addiction; they respond with an outpouring of support.