The Substitute (Glee)
Kurt confronts Mercedes. He tells her that she may be substituting food for love and their friendship for a romantic relationship. Mercedes decides to talk to the student who Kurt tried to set her up with. As she leaves, school bully Dave Karofsky (Max Adler) approaches Kurt. He tells Kurt that he will kill him if Kurt tells people that he is gay. At the request of the glee club members, Sue makes Will the director again. He suggests a group performance of "Singin' in the Rain". Will asks Holly to help them make it modern. They end up with a mash-up with Rihanna's "Umbrella" song.