"Uncle Carl" is the eighth episode of the fifth season of the American television comedy drama Shameless, an adaptation of the British series of the same name. It is the 56th overall episode of the series and was written by co-executive producer Krista Vernoff and directed by Wendey Stanzler. It originally aired on Showtime on March 8, 2015.

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 enlists Carl to get rid of Sammi, while Ian returns home from the psych ward.

According to Nielsen Media Research, the episode was seen by an estimated 1.60 million household viewers and gained a 0.7 ratings share among adults aged 18–49. The episode received critical acclaim, who praised the storylines, performances and cliffhanger ending.

Fiona (Emmy Rossum) and Lip (Jeremy Allen White) pick up Ian (Cameron Monaghan) from the ward, after his doctor diagnoses him with a severe bipolar disorder. Frank (William H. Macy) is still forced to hang out with Sammi (Emily Bergl), who also prevents him from revealing she caused the gunshot.

Carl (Ethan Cutkosky) is tasked by his drug boss, G-Dog (Stephen Rider), in smuggling heroin to Flint, Michigan. Seizing the opportunity, Frank convinces Carl in taking Chuckie (Kellen Michael) with him, so he can use it as a scapegoat if anything goes awry. At the station, police officers arrive at the scene, prompting Carl to abandon Chuckie. The officers' dogs discover the heroin in Chuckie, and he is subsequently arrested. Lip is still trying to find ways to cover his financial debt at tuition, and asks Kevin (Steve Howey). They then decide to revisit their marijuana-selling days, and Lip uses his status as resident assistant to gain customers. During a meeting with a tutor, Lip explains his problems at home, and his tutor offers to try a new alternative.

While Debbie (Emma Kenney) is asked to watch over Ian, she misses him descending from his room. In the kitchen, he notices the three bottles of lithium and flushes them down the toilet. This horrifies Debbie, who tries desperately to find new prescriptions. She asks Mickey (Noel Fisher) for help, but Mickey has fallen into alcoholism after Ian's medical condition, and Debbie calls him out for not helping Ian in his recovery. While separated from Kevin, Veronica (Shanola Hampton) hangs out with Svetlana (Isidora Goreshter), and they bond after she gives her oral sex to relieve her stress.

Fiona meets with Gus (Steve Kazee), hoping to reconcile their marriage by accompanying him into his tour. However, Gus makes it clear he is still distracted by Fiona having sex with Jimmy, and wants to go on tour to re-consider their marriage. Kevin is later seen sleeping in the college dorm room, after having sex with one of Lip's classmates. Sammi is upset upon learning of Chuckie's arrest, unaware that Frank called the cops to warn them. That night, Sammi calls cops to arrest Carl, claiming he was the actual mule. Carl flees from the house but is arrested a couple of streets away. As the family awaits for a response, Mickey finally reconciles with Ian.

The episode was written by co-executive producer Krista Vernoff and directed by Wendey Stanzler. It was Vernoff's fourth writing credit, and Stanzler's first directing credit.