Charlie - a baseball player with anger issues turned anger management therapist - decides to return to therapy after a bad run-in with his ex-wife's new boyfriend. The only problem is he just happens to be sleeping with the one therapist he trusts: his best friend, Kate.

Kate steals a patient from Charlie, fueling the competitive rivalry between the two therapists.

Charlie and his ex, Jennifer, are having an issue with how Charlie still tries to manage her life when Cleo - one of Charlie's patients from his prison anger therapy group - shows up on his doorstep, fresh out on parole. Jennifer decides to get back at Charlie by dating the ex-con.

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

Jennifer moves in with Charlie temporarily and Kate gets jealous.

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

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

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

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

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

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

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 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 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 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.

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 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.

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

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

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

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

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 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.