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.

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

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

It's wedding day and Frank shows up uninvited - and high.

Frank wakes up after a month-long coma to find no one missed him. Worried she isn't a good mother, Debbie takes a criminal approach to making sure Franny grows up wealthy. Meanwhile, Lip successfully completes rehab and is determined to stay "sober;" Carl looks into surgery after learning he's the only uncircumcised brother; and Ian gets a bad feeling about Caleb's friend Denise.

Ready to disown his family, Frank takes Liam under wing and starts a new life barricaded on the top floor of the Gallagher home. Fiona, meanwhile, adopts a new, relaxed attitude and starts running Patsy's Pies on her own terms. Debbie gets into trouble in the stroller business; Ian tries out heterosexuality; and Carl finds himself forced into abstinence.