After Hours (House)

"After Hours" is the twenty-second episode of the seventh season of the American medical drama series House. It aired on May 16, 2011 on Fox.

There are three plot lines in this episode. First, a relapsed drug-user and Thirteen's friend, Darrien, from prison arrives at her apartment needing medical help after getting stabbed. She makes Thirteen promise that she won't take her to the hospital because Darrien believes the cops will be waiting for her there.

After noticing that Darrien has no blood pressure in her left arm, Thirteen calls in Chase to get some equipment from the hospital and bring it to her house. Chase stays to help and suggests that she might have a lipoma in a blood vessel in her left armpit. They suck it out after using many syringes. They also know that she was on interferon in prison for her hepatitis C.

Darrien then begins to hallucinate and Chase has to fight off Thirteen in order to take Darrien to the hospital. At the hospital, they call House after Darrien falls into a coma. He tells them that they need to find out when Darrien contracted her hepatitis C. Thirteen is able to discover that Darrien has had hepatitis for no more than three years, but because she received chronic hepatitis C treatments with interferon while she was in jail, her presentation must have made it appear she had it longer.

Thirteen and Chase finally deduce that in addition to the hepatitis C, Darrien must have had a second infection with the parasite Entamoeba. The amoeba had formed an abscess in her liver and thus when her liver was injured in the stabbing, it released the parasite back into her bloodstream which led to her other symptoms.

Thirteen and Chase give Darrien some metronidazole and she comes out of her coma. In the aftermath, Thirteen breaks down and admits her frustration, about her brother's death and her friend's arrest and chides Chase that he does not know the confusion over choosing to take a life. Chase responds that they should get a coffee, hinting that he plans to share his recent past with similar consequences.