Shameless - Season — 4

: Ian returns after going AWOL, exhibiting erratic and hyper-sexualized behavior that the family eventually identifies as bipolar disorder, mirroring their mother Monica.

: Fiona is arrested for child endangerment, faces imprisonment, and is forced to confront that she has inherited the same "Frank-like" tendencies she once despised. Lip’s Evolution and Responsibility Shameless - Season 4

: After finding stability with a steady job and dating her boss, Mike Pratt, Fiona begins a self-destructive affair with Mike's brother, Robbie. : Ian returns after going AWOL, exhibiting erratic

Frank faces near-certain death due to liver failure, forcing him to seek out a donor from his past. Frank faces near-certain death due to liver failure,

: To prove his commitment to Ian, Mickey publicly comes out as gay during a bar brawl at the Alibi Room, marking a massive departure from his previously repressed, violent persona. Frank’s Mortality and the Arrival of Sammi

With Fiona in legal turmoil, the burden of leadership shifts to Lip, who is already struggling to balance his South Side roots with his new life at Chicago Polytechnic.

The central arc of the season focuses on Fiona's transition from the family's "emotional anchor" to a legal and moral outcast.