'Glee' new 'Britney/Brittany' pics: John Stamos, Rachel-Finn and more

We've already seen the Britney Spears pictures from "Glee's" second episode back, titled "Britney/Brittany," but what else is going on besides a tribute to the pop princess?

In the Sept. 28 episode, John Stamos stops by as Dr. Carl Howell, a dentist who romances Emma (Jayma Mays), and puts into motion the dream sequences that bring Spears to "Glee."

Here's the rascally Dr. Carl now:

john-stamos-glee-350x500.jpgBack at William McKinley High, Artie ( Kevin McHale) and Finn ( Cory Monteith) have a heart to heart in the boys' locker room. Hmm, we're wondering what Artie is doing there. Could he be the new water boy?

glee-kevin-mchale-cory-monteith-s2ep2.jpgNew football Coach Beiste (Dot Jones) might have a few choice words for them.

glee-dot-jones-kevin-mchale-cory-monteith-s2ep2.jpgOkay, is the locker room now becoming Grand Central Station? What's Rachel ( Lea Michele) doing here? She doesn't look too pleased, but it has to be pretty upsetting news to make Rachel invade a smelly all-male sanctum, in which she could be confronted by jock straps and worse.

glee-lea-michele-s2ep2-01.jpgAww, at least Finn is trying to help out. Maybe this has something to do with her parents?

glee-lea-michele-s2ep2-02.jpg"Glee" returns for its second season on Tuesday, Sept. 21.

Follow Zap2it and Zap2itHanh on Twitter and Zap2it on Facebook for the latest movies, TV and celeb news.

Photo credits: FOX