Frank employs Liam to help him chase down a romantic connection; Fiona struggles to keep up with the demands of her new investment as Ford pushes her to get serious about their relationship.

Fiona is thrown into chaos by the return of Jimmy. Ian takes Mickey's baby.

Debbie finds Fiona at a low point and helps her pick up the pieces as Fiona continues to face pressure from Max Whitford on her investment hubris. Frank enjoys the honeymoon period of his relationship with Ingrid.

Fiona and the family prepare a surprise high school,graduation party for Lip. Frank wins a bet and uses the winnings to take Lip out for lobster and some quality father/son time.

Ian and Caleb get serious. Lip appears before a disciplinary committee.

A confrontation between Sean and Frank quickly descends into a brawl.

A violent meth dealer threatens the Gallaghers, forcing Ian, Carl, Lip and Debbie to find a way to pay him off without involving Fiona. Fiona battles it out with a vindictive tenant. Lip cares for a down-and-out Professor Youens. Frank - miraculously - attains something resembling sainthood.

Gus tells Fiona he's leaving to go on tour. Frank seeks revenge on Sammi.

Frank worries that he and his new family will lose their Home for the Homeless shelter, so he plans a little goodwill for the neighborhood. Meanwhile, Fiona drums up business by throwing a speakeasy party at Patsy's Pies.

Frank plays tour guide for his doctor. Fiona preps Carl for sentencing.

Frank’s new liver medication comes with tragic side effects. Ian tries to get away from Fiona’s hovering. Lip has to keep himself occupied during a day of temptation. Carl makes a connection at a West Point mixer. Debbie tries to repair things with Alex.

Sheila gets an offer to buy her home. Plus, Fiona is off house arrest!

Fiona's plans to announce her marriage unravel. Mickey asks for Lip's help.

Fiona confronts Patrick. Ian makes a discovery at the firehouse.

Steve tries to convince Fiona to skip town with him now that his true livelihood as been discovered; Frank and Karen's secret is revealed, forcing Frank to go into hiding; Fiona tries to figure out how to get Lip and Ian out of jail after their arrest for car theft.

Grammy Gallagher shows up on a medical furlough and tries to track down a former meth lab protege that owes her money; Sheila plans Karen's wedding reception; Fiona double dates with Steve and his Brazilian girlfriend, and discovers that Steve is married; Ethel reacts to Clyde's death; Frank discovers the identity of Eddie's insurance beneficiary.

The Department of Family Services hauls the Gallagher children away, leaving Fiona desperate to get them back. With Monica nowhere to be found, Fiona is forced to find Frank and get him to make a "Father of the Year" appearance in court. It all goes well until Fiona discovers that Frank's not the solution to her problem - he's the cause. Meanwhile, Kev and Veronica recruit V's mother as a surrogate and Terry catches Mickey and Ian in a compromising situation.

To prepare for a visit from her probation officer, Fiona must remove all paraphernalia from the house; Ian is kicked out of Mickey's house.

Fiona gets out of jail. Frank is feeling like his old self.

Ian finds himself at the psych ward. Fiona decides between Jimmy and Gus.

Frank has a ball with his new sick friend and formerly uptight doctor.

Sean moves into the Gallagher house as Fiona plans a traditional wedding.

Frank’s injury gets in the way of everyone’s plans as Fiona attempts to get her life back on track and Lip grows frustrated with his relationship with Tami. Carl gets some bad news about his future, and Debbie finally makes a move on Kelly. Kevin and Veronica get in trouble at the twins’ preschool.

With Grammy near death, Frank exits the house but walks in on Ian and Mickey locked in passion at the Kash and Grab; when Lip drops out of school, Fiona proposes a deal where they both earn their diplomas, but Lip acts out and gets himself expelled when he realizes that Karen plans to sell their baby to the highest bidder.

The city of Chicago gives notice that they're doing work on the sewer main. The problem? Aunt Ginger's bones are still buried in the yard and Frank needs to find her before the city does. Meanwhile, Fiona is picked on at work for not satisfying her boss. When Fiona fails to provide the support Jimmy needs, he turns to Este. Molly learns that she's a boy and Ned asks Ian to rob his wife's house.