Season 4, Episode 13
In the fourth-season finale, the sighting of Jimmy's “ghost” is the talk of the firehouse; Colleen blames Tommy for her failed relationship, and Tommy figures out a way to fix his own. Meanwhile, Franco and Natalie come to an understanding, as do Lou, Mike and Latrina; Tommy and his father take in a ball game.
Season 4, Episode 12
Tommy plays hero in someone else's uniform, confusing the crew; Colleen finds a new reason to get upset with Tommy; Natalie asks Franco for a favor; a rift between Mike and Black Shawn nearly leads to blows; and the chief is not pleased with the move Tommy makes on his daughter. Valerie: Gina Gershon.
Season 4, Episode 11
Tommy goes on a second date with Beth (Amy Sedaris) for the sake of the crew. He also sees Valerie (Gina Gershon) again, and makes a trade with Colleen. Meanwhile, Black Shawn proves himself in an unexpected arena; Franco sees what he has lost; and Lou finds something very attractive about Latrina (Sharon Watkins).
Season 4, Episode 10
The Gavins attend their first AA meeting, but Sean isn't welcome since he doesn't drink enough; Tommy turns to Colleen for information about Janet and learns some disturbing things about his childhood from his father (Charles Durning); Richie tells Franco what Natalie has been doing since their breakup; Lou mulls revenge on his cousin (Artie Lange); and Mike, under orders from Tommy to “stop moping,” visits a singles bar. Valerie: Gina Gershon.
Season 4, Episode 9
The Gavin clan stages an intervention after several disturbing family calls; the mysterious woman (Gina Gershon) from the restaurant leaves Tommy wanting more; Janet must take matters into her own hands to get her baby back; and a depressed Mike calls Tommy in a moment of despair.
Season 4, Episode 8
Janet plots revenge when she learns what Tommy did with the baby; Franco questions his marriage proposal to Natalie in light of Alicia and Keela's return; and Tommy faces his ghosts. He also agrees to date Chief Feinberg's needy and awkward daughter (Amy Sedaris). Valerie: Gina Gershon. Alicia: Susan Sarandon.
Season 4, Episode 7
A devastating fire has a profound effect on the crew; Tommy wrestles with his feelings about the baby; Alicia (Susan Sarandon) returns with a proposition for Franco; Troy breaks up with Sheila while Lou makes a tough decision about Theresa; and Sean apologizes to Mike about the fire he set that burned down Mike's mother's house.
Season 4, Episode 6
Janet sinks deeper into her postpartum depression; Sean learns a secret that Mike has been trying to hide; the new probie (Larenz Tate) holds the guys to their agreement about not doing “probie” work; Lou and (especially) Theresa struggle with their decision to “take a break” from sex. Cousin Mike: Artie Lange.
Season 4, Episode 5
The firehouse gets a new chief (Jerry Adler), who is rumored to possess a very special gift; Tommy suffers embarrassment during a hockey game against the NYPD; Franco works up the nerve to propose to Natalie while Sean tries to talk Maggie out of a divorce; and Sheila makes a surprising proposition as Janet's depression deepens.
Season 4, Episode 4
Emotions flare up when the crew learns about Jerry's death; Tommy's manhood is called into question after some embarrassing romantic encounters; Sean confronts Maggie about her drinking; Franco considers asking Natalie to marry him; and Lou looks for a way to get that ringer Bart for the house basketball team.
Tommy encounters Colleen's boyfriend and sparks fly; Jerry learns he flunked his physical and is given a desk job; Uncle Teddy, hiding from Ellie, breaks into prison guard Lenny's apartment; Sheila goes out with the man who pulled her from the beach house, while Tommy keeps avoiding Nona (Jennifer Esposito), the volunteer firefighter who rescued him from the blaze; and Mike seeks Tommy's advice on how to deal with his dying mother's request that he kill her.
Season 4, Episode 2
Sheila lies to Tommy when he confronts her about the beach-house fire. But they present a united front to the insurance investigators, as embarrassing as it is for Tommy. Meanwhile, Lou is determined to get a basketball ringer (Larenz Tate) to be 62 Truck's new probie; Uncle Teddy is released from jail; Colleen runs away with her rock-musician boyfriend; and Mike's mother has a deathbed request.
Season 4, Episode 1
Janet has given birth to a baby boy---whom she fears prefers Tommy to her. But Tommy has a bigger problem: He's suspected of starting the beach-house fire. Meanwhile, Jerry's son asks him to be his best man at his commitment ceremony; Richie wants Franco to marry Natalie; Lou and Theresa get distracted in church; and the volunteer firefighter (Jennifer Esposito) who rescued Tommy from the beach house takes an interest in him---and isn't shy about letting him know.