In Treatment is an American drama television series for HBO, produced and developed by Rodrigo Garcia, based on the Israeli series BeTipul (Hebrew: בטיפול), created by Hagai Levi, Ori Sivan and Nir Bergman.

The series is about a psychotherapist, 50-something Paul Weston, and his weekly sessions with patients, as well as those with his own therapist at the end of the week. The program, which stars Gabriel Byrne as Paul, debuted on January 28, 2008, as a five-night-a-week series. Its executive producer and principal director was Paris Barclay, who directed 35 episodes, the most of any director on the series, and the only one to direct episodes in all three seasons. The program's format, script and opening theme are based on, and are often verbatim translations of BeTipul. HBO Canada aired the program simultaneously with HBO in the U.S. Season 1 earned numerous honors, including Emmy, Golden Globe and Writers Guild awards.

The series was renewed for a second season on June 20, 2008, and production on Season 2 wrapped in early 2009. According to The New York Times, production relocated to New York City from Los Angeles at the insistence of Byrne, who otherwise threatened to resign. The move and the addition of Sunday night to the schedule were considered votes of confidence in the series by HBO executives. Season 2 premiered on April 5, 2009. The second season built on the success of the first, winning a 2009 Peabody Award. The third season premiered on October 26, 2010, for a seven-week run, with four episodes per week. The 24-episode fourth season premiered on May 23, 2021, and aired four episodes weekly.

In February 2022, HBO confirmed that the show would not return again.