Brett Clifford Gelman is an American actor and comedian He was born on October 6 1976 in Highland Park Illinois He is best known for his roles as Murray Bauman in the Netflix series Stranger Things and Martin on the BBC series Fleabag Gelman began his career as a comedian in the early 2000s He performed in numerous comedy clubs and improv theaters in New York City In 2009 he was a writer and performer on the sketch comedy series Eagleheart He also had a recurring role on the comedy series Another Period In 2016 Gelman was cast as Murray Bauman in the third season of Stranger Things His character is a conspiracy theorist who helps the main characters investigate the supernatural events in Hawkins Indiana Gelman has since appeared in all four seasons of the show In 2016 Gelman also starred in the BBC series Fleabag He played Martin the boyfriend of the shows main character Fleabag Gelmans performance was critically acclaimed and he was nominated for a Primetime Emmy Award for Outstanding Supporting Actor in a Comedy Series Gelman has also appeared in numerous films including The Other Guys 2010 30 Minutes or Less 2011 and A Very Harold Kumar 3D Christmas 2011 He has also had recurring roles on the television shows Go On Married and Camping