High Quality Content by WIKIPEDIA articles! "Duets" is the fourth episode of the second season of the American television series Glee, and the 26th episode overall. It was written by series creator Ian Brennan, directed by Eric Stoltz, and premiered on Fox on October 12, 2010. The episode featured seven cover versions, including a mash-up of "Happy Days Are Here Again" and "Get Happy" by Barbra Streisand and Judy Garland, respectively.