: 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 and hyper-sexualized behavior that the family eventually identifies as bipolar disorder, mirroring their mother Monica. Shameless - Season 4
: 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 : After finding stability with a steady job
: Lip finds himself academically behind and socially isolated until he connects with Amanda, who helps him navigate the collegiate world. Frank’s Mortality and the Arrival of Sammi :
: During a birthday party, baby Liam accidentally ingests Robbie's cocaine and suffers an overdose.
: Following Fiona’s arrest, Lip takes over as the primary caregiver for his younger siblings, leading to intense friction between him and Fiona. Ian’s Return and Mickey’s Coming Out