Glee introduced viewers to a number of new characters on this week's season two premiere.

What do you think of Coach Beiste, Sunshine and Sam? Hurry up and decide, because the show will throw even more at fans next week.

John Stamos makes his debut as Emma's new love interest. As Dr. Carl, the actor will make an immediate impact, contributing to the much-anticipated Britney Spears episode of the show. Watch the following preview for it, and get the DVR ready:

[video url="http://www.tvfanatic.com/videos/britney-episode-promo/" title="Britney Episode Promo"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.