Charlie blows up at his sister's baby shower.

Charlie wonders if his father is developing Alzheimer's.

Charlie begins a questionable romantic relationship with an ex-patient.

Charlie's dad falls in with a bad crowd.

Jennifer moves in with Charlie temporarily and Kate gets jealous.

Charlie tries to help his patient with a placebo pill that supposedly reduces anger.

Charlie dates his daughter's teacher.

Charlie takes on Cee Lo Green as a therapy patient.

Charlie and Kate face off as expert witnesses in the same trial.

Martin has Charlie's daughter baptized behind Charlie's back.

Charlie dates Jennifer's business partner and finds out she has sexual anger issues.

Lindsay Lohan comes to Charlie for therapy and they begin a tumultuous relationship.

Charlie's neighborhood is up in arms when they find out he's been having clients with anger issues meeting at his home.

Charlie takes the group on an equine therapy retreat.

Charlie inadvertently puts two patients together in a romantic relationship.

Charlie gets jealous and uses a patient to spy on Kate.

Charlie lets his father help him coach a high school baseball team with bad results.

Charlie's ex causes him problems with his group when she becomes one of his patient's life coach.

Martin tells Kate that Charlie and Jennifer are getting back together.

Charlie shakes up his relationship with Kate while dealing with the return of Jen's ex-boyfriend.

Charlie begins seeing a new female therapist who used unorthodox therapy methods; Patrick tricks Ed into thinking he won the lottery.

Charlie and Kate try to control their sexual urges as they begin work together on their sex study; Lacey starts a new job as a pharmaceutical rep.

Charlie discovers scandalous information about Jen's new boyfriend, Sean, when he joins his therapy group.

Charlie breaks all the professional rules by starting a friends-with-benefits relationship with a hot woman subject from the sex study. Also, Nolan and Patrick fight over a woman.

Charlie's trip with the group is interrupted when he gets some interesting news from Kate. Also, Charlie's house is unwittingly used for a porno shoot.

Charlie steals a hot woman from an angry nerd. Lacey takes drugs in order to sell drugs.

Charlie inadvertently picks up the sister of one of his most violent patients at prison.

Charlie suspects Jen's boyfriend, Sean, is cheating on her with his patient, Lacey. Also, Nolan's apartment gets robbed.

Charlie mistakenly becomes a sex surrogate for one of Kate's patients, who is a thirty-two-year-old virgin.

Charlie has to deal with the aftermath when his dad moves in with his patient Ed and they hit someone with their car. Also, Lacey takes Nolan out for a night of clubbing.

Charlie goes too far when he gets jealous of Jennifer's much younger boyfriend, Canvas. Meanwhile, Patrick helps Lacey look sexy for her first modeling gig.

Charlie is held hostage by his prison group during a riot.

Charlie and Kate are ready to sleep with the right people to get funding for their sex study.

Charlie tries to stop Kate from having sex with the executive in charge of funding their study; Charlie's dad tries to stop Lacey from throwing herself at a sleazy yoga instructor.

Charlie recruits Sean to help him throw the epic party of the century; Lacey inadvertently gets Ed hooked on drugs.

Charlie invites Ellie (Brea Grant), an attractive grad-student, to observe a therapy session only to have to compete with Nolan for her affection. Meanwhile, Ed and Martin come up with a plan to scam the government by hosting a disabled war veteran in their house.

Charlie is forced to hire a new psychologist to replace Kate in his sex study; Jennifer and Lacey trick Sean.

Charlie sleeps with Jordan's hot AA sponsor who happens to be a recovering sex addict.

Charlie accepts a new patient, a pimp named Ray James II, into his therapy group. After Charlie sleeps with a young woman called Sasha (Anna Hutchison) who approached him at the bar, she reveals that she's a hooker and that Ray sent her as payment for his sessions. Meanwhile, Lacey, Nolan and Ed are creeped out by Ray, and attempt to hold their own self-help session without Charlie present.

Charlie invites a new therapy patient named Bob (Bob Clendenin) into the group, who casually tells everyone that he is the devil. Nolan makes a deal with Bob to sell his soul in exchange for Lacey falling in love with him. When Lacey is all over Nolan at the next session, even the skeptical Charlie starts to wonder. Meanwhile, Jen falls for a new neighbor while Sam falls for a young man who appears to be the neighbor's son, but the two are later revealed to be gay.

Charlie and Sean go to war when Charlie begins having casual sex with his ex, who is Sean's former girlfriend.

Charlie seeks his prison group's help when his partying ways result in him getting arrested.

Charlie asks for a second chance with the woman to whom he lost his virginity, and Lacey and Patrick try to keep up appearances when Lacey's parents pay a surprise visit.

Charlie is pursued by a hot reporter who wants to experience his sex study.

Charlie gets Jordan to pose as his prison patient's fiancé.

Charlie's Christmas plans with Sasha are derailed when Ed steals the baby Jesus from a Latino church.

Charlie seeks his prison group's help when his partying ways result in him getting arrested.

Charlie convinces Jordan to pose as the fiance'e of a member of his prison group, and Lacey and Patrick gamble away part of Lacey's parents' money.

Jordan's twin sister, identical in every way except hair color and the addition of fake boobs, is in town. Jordan tells Charlie that the two don't get along ever since her sister slept with her former fiancee. She asks Charlie to help mend the damage between them, but he winds up sleeping with the twin. Elsewhere, Lacey's sister blackmails her into buying her whatever she wants in exchange for not revealing to their parents that the marriage to Patrick is a sham.

Charlie and Sean start a competition to see who can score first with a gorgeous woman.

When Charlie's best party buddy becomes a priest; Charlie's tries to tempt him with women and liquor.

Charlie falls for the sexy daughter of his father's warring neighbor.

Charlie is in trouble when he finds out that a woman he had a one-night fling with is related to his supervisor.

Charlie uses Jordan to improve his online date rating.

Charlie is inspired to start a new clinic at the prison after Jordan wrecks their sex study.

When Charlie keeps choosing sex over work, Jordan convinces his girlfriend, Sasha, to cut him off for six months.

Charlie goes ballistic when a drunk Jordan makes out with a prisoner.

Charlie spends the night with Lacey to keep her from killing her ex-boyfriend.

When Charlie breaks it off with a police officer he's been dating, she abuses her power to make his life miserable. Meanwhile, Jordan struggles to establish a casual sex relationship with Sean.

Charlie tries to keep Lacey from hooking up with a dangerous ex-con.

Charlie surprises his therapy group by bringing their dysfunctional parents to a session.

Sean tells Charlie not to have sex with his visiting sister, and Patrick and Lacey discover that they are dating the same man.

Problems arise after Charlie has a threesome with his girlfriend and one of her friends, and Lacey uses Jordan's help to try and sell her eggs.

Charlie gets Sean fired from the strip club when he sleeps with a stripper.

Charlie makes a promise to an attractive reporter; it involves an interview with an extremely furious convict.

Charlie and Jordan have to share a hotel room to expose a shady couple's therapist.

Charlie sets up Sean with a hottie even though he knows Sean is seeing Jordan.

Charlie gets in hot water with his prison group when he sleeps with the attractive new warden.

Charlie inadvertently helps a member of his prison group in an escape attempt.

Charlie struggles to control his anger after meeting a hot girl who doesn't date angry guys.

Charlie goes to war with his garbage man.

Charlie becomes paranoid after discovering he's dating a private investigator.

Charlie falls into trap when Jordan sets him up with a heartbreaker.

Charlie finds himself in a contest with a female private investigator to prove that he could cheat on her without getting caught.

Charlie's life is taken hostage by a controlling techy girl.

Charlie creates a monster when he helps Nolan unleash his anger.

Charlie lets his house become a halfway house for five hookers.

Charlie tries to help Patrick through a crisis of confidence by getting him stoned.

When Charlie tricks Lacey into believing her father is broke, she gets engaged to an obnoxious billionaire. Meanwhile Nolan makes a business arrangement with Sean's strip club.

Charlie almost destroys Ed's marriage; Jordan hits on Nolan.

Charlie goes to Vegas and life gets complicated after a night of heavy drinking.

Charlie risks his life to sleep with a thrill-seeker.

Charlie wants to make a business deal with Jordan's ex-husband, but he knows Jordan won't go along if she knows the identity of the business partner. Meanwhile, Lacey gets jealous when Nolan tries to save a family of birds.

Charlie becomes trapped in a wild dream where he can't distinguish between what's real and what's not.

A matchmaker sets up Charlie and Sean with the wrong dates.

Charlie interferes with Lacey and Nolan's love life and gets Nolan kidnapped by prisoners.

Charlie's father sets him up with a hot, but quiet Catholic girl who turns out to be too wild, even for Charlie.

Charlie and Jordan hire a hot tie-breaker to work as their associate on the prison clinic program.

Charlie has to make a decision between keeping his group and being a sports psychologist for a baseball team.