Room 104 is an American television anthology series created by Mark Duplass and Jay Duplass. The series debuted on July 28, 2017, on HBO. A twelve-episode second season aired between November 9 and December 15, 2018. On February 8, 2019, HBO revealed that a third season had been filmed and that the network were in talks for a fourth season renewal. The show's twelve-episode third season premiered on September 13, 2019. Filming for season 4 was completed by September 2019. In May 2020, HBO announced that the fourth season would be its last and it premiered on July 24, 2020, and concluded on October 9, 2020.