Frank stalks his previously unseen daughter, Sammi, and is surprised to find out she has a son, Chuck. Meanwhile, Fiona and Mike are getting serious. Also, Carl begins stealing dogs and holding them for ransom so that he can earn some drug money for Frank. Sheila has her first successful online date with Native American cowboy Roger Running Tree.

Fiona's series of bad decisions involving Robbie finally boil over. Meanwhile, Frank and Sammi pursue a cure for Frank's liver trouble and try to catch up on missed father-daughter time; and Lip gets a surprise visit at college from Army investigators.

Fiona ends up in jail; the family waits for news about Liam; Frank wakes up in the emergency room.

Guardianship duties fall upon Lip - who gets some unexpected assistance.

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.

Carl connects with a girl in detention; Lip and Amanda grow closer; Sheila returns with big plans; Fiona searches for a job; Mickey spends time with Ian.

Fiona violates terms of her probation, sending the family into search party mode.

Fiona is hauled off to a correctional facility. Amanda’s parents bribe Lip.

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

Fiona juggles her job and a crush. Lip heads back home.

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

Frank enlists Carl to scare off the lesbians. Debbie throws a wild party.

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

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

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

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

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

Fiona reunites with Gus. Frank works to keep Bianca happy. Season finale.

Frank's newfound appreciation freaks the Gallaghers out.

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

Frank helps Erica as Debbie ups her game. Lip tries to protect Helene.

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

Carl remakes the Gallagher home as his "crib." Debbie gets let go.

Sean catches Will with one of Carl's guns and Fiona bears the brunt.

Fiona tries to make amends with Sean. Debbie and Queenie trek to a commune.

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