"Mash-Up" is the eighth episode of the American television series Glee. The episode premiered on the Fox network on October 21, 2009. It was written by series co-creator Ian Brennan and directed by Elodie Keene. The episode sees glee club director Will Schuester (Matthew Morrison) attempt to create a wedding medley in the style of a mash-up for his colleagues Emma (Jayma Mays) and Ken (Patrick Gallagher).