Room 104 is an American television anthology series created by Mark Duplass and Jay Duplass.[1] The series debuted on July 28, 2017, on HBO.[2] A twelve-episode second season aired between November 9 and December 15, 2018.[3][4] 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.[5] The show's twelve-episode third season premiered on September 13, 2019.[6] Filming for season 4 was completed by September 2019.[7] In May 2020, HBO announced that the fourth season would be its last and it premiered on July 24, 2020,[8] and concluded on October 9, 2020.