Sheila fights for custody and clashes with Sammi; Lip catches up on bills; Fiona is released; Frank begins to feel like himself.
Fiona is taken to a correctional facility; Frank suffers post-operative delirium; Ian crashes Mickey's son's christening; Amanda's parents use bribery to keep Lip away from her; Debbie meets an older student.
Fiona violates terms of her probation, sending the family into search party mode.
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.
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 is released; Lip takes over guardianship duties, receiving unexpected assistance.
Fiona ends up in jail; the family waits for news about Liam; Frank wakes up in the emergency room.
Fiona's bad decisions about Robbie come to a head; Frank and Sammi continue their quest for a cure; Lip is visited while at college.
Fiona continues her affair with Robbie; Frank wants to construct an accident that will enable him to pay for his transplant.
Frank stalks his daughter, Sammi; Fiona and Mike get serious; Carl tries to hear money for Frank; Sheila has a successful date.
Fiona enjoys living above the poverty line; the company car is damaged; Lip struggles in school.
Frank returns, disrupting life; Lip attends college; Ian is missing; Fiona tries to connect with Debbie and Carl.