David Schwimmer rose to prominence in the popular sitcom Friends, and throughout the show's 10-year run, he also proved his skills as a director. Schwimmer starred as the largely unfortunate Ross Geller in the popular sitcom, and his character became one of the most recognizable sitcom characters in TV history. But he is also recognized as the only leading cast member to have served as a director for several notable episodes of the show.
https://screenrant.com/friends-episodes-david-schwimmer-director-ranked/