A House Divided (Person of Interest)

"A House Divided" is the 22nd episode of the third season of the American television drama series Person of Interest. It is the 67th overall episode of the series and is written by co-executive producer Amanda Segel and directed by co-executive producer Chris Fisher. It aired on CBS in the United States and on CTV in Canada on May 6, 2014.

The series revolves around a computer program for the federal government known as "The Machine" that is capable of collating all sources of information to predict terrorist acts and to identify people planning them. A team, consisting of John Reese, Harold Finch and Sameen Shaw follow "irrelevant" crimes: lesser level of priority for the government. In the episode, the team must find Finch while at the same time protecting five numbers vital to Samaritan's development. Flashbacks explore Collier's life before the events of the series. Despite being credited, Kevin Chapman does not appear.

According to Nielsen Media Research, the episode was seen by an estimated 10.50 million household viewers and gained a 1.7/5 ratings share among adults aged 18–49. The episode received very positive reviews, with critics praising the flashbacks and character development, although the pace of the episode received criticism.