"Fiona Interrupted" is the twelfth episode and season finale of the second season of the American television comedy drama Shameless, an adaptation of the British series of the same name. It is the 24th overall episode of the series and was written and directed by series developer John Wells. It originally aired on Showtime on April 1, 2012.

The series is set on the South Side of Chicago, Illinois, and depicts the poor, dysfunctional family of Frank Gallagher, a neglectful single father of six: Fiona, Phillip, Ian, Debbie, Carl, and Liam. He spends his days drunk, high, or in search of money, while his children need to learn to take care of themselves. In the episode, Frank tries to get Monica out of a psychiatric institution while Karen makes an ultimatum to her mother.

According to Nielsen Media Research, the episode was seen by an estimated 1.45 million household viewers and gained a 0.7 rating share among adults aged 18–49. The episode received highly positive reviews from critics, who praised the writing, directing and performance of the episode.

The Gallaghers are affected by the recent events of Monica's attempted suicide and the birth of Karen's developmentally delayed child. In the aftermath of her suicide attempt, Monica is now in a psychiatric institution; Frank visits her, promising to help her escape.

Lip and Karen return to her house, having been informed that Sheila stole the baby from the hospital. Sheila and Jody want to take care of the baby, whom they named Hymie, but Karen wants the baby back in adoption. Lip tries to interfere, but is reminded by Karen that he is not the father, causing him to walk out, cutting ties with Karen. When Sheila makes it clear she wants to keep the baby, Karen calls the cops. One of these is Tony, who is bewildered by Karen's actions. When they refuse to take the baby or arrest Sheila, Karen makes an ultimatum to her mother; the baby or her. Steve, now going by Jimmy again, decides to take Fiona and her family to dine with his parents. The dinner goes well until Jimmy's father, Lloyd arrives; Ian recognizes Lloyd as the man he had sex with a few nights earlier. Later, Fiona and Steve have sex, but are interrupted by Estefania, who shows up crying and asks Jimmy to let her stay, revealing that she was abused by Marco.

With the help of a bar patron, Frank and Debbie sneak into the institution to retrieve Monica. They convince her in escaping, along with her new girlfriend, Jill . They escape through a window, but Frank is surprised when Monica flees with Jill in the car; Debbie tearfully reveals that Monica told her they are better off without her. While talking with Lip, Mandy consoles his predicament and suggests he should go back home. The following day, he returns to school to finish a test. He then visits Karen, who is packing her bags. When Karen pushes Sheila to make a decision, Sheila chooses the baby, prompting Karen to storm out; Lip tells her she will regret her decision in the future. That night, Frank goes to the house and gets into a fight with Ian, prompting Estefania to knock him out with a frying pan. The family drags Frank outside, just as Lip returns home.

The episode was written and directed by series developer John Wells. It was Wells' fifth writing credit and third directing credit.

In its original American broadcast, "Fiona Interrupted" was seen by an estimated 1.45 million household viewers with a 0.7 in the 18–49 demographics. This means that 0.7 percent of all households with televisions watched the episode. This was a slight decrease in viewership from the previous episode, which was seen by an estimated 1.51 million household viewers with a 0.8 in the 18–49 demographics.