Looks like school's about to be in session, Greendale gang!  'Community's season 4 debut might be one of the longest hiatuses we've had to endure, but the return to Greendale on October 19 will be well worth the wait as we settle in for the new 13-episode season, which looks to premiere with some of our long-running 'Community' favorites.  But what dramatic returns and unexpected hookups do the first images from 'Community' season 4 premiere "History 101" reveal?

The Greendale seven are going to take a trip back through time, or so the first photos from 'Community' season 4 premiere "History 101" would suggest.  The new photos don't reveal a heck of a lot, and feature more Shirley (Yvette Nicole Brown) than anyone else, but a specific few of the shots have us feeling very nostalgic.

For one, the photos feature the return of (or perhaps a flashback to) Annie's Boobs, and even a monkey!  Joking aside, 'Animal Practice' star Crystal the Monkey will be back reprising her role as "Annie's Boobs," if only to make nice with the adorable Greendale girl for whom she's named.  Plus, who doesn't love another fabulous outfit for Dean Pelton (Jim Rash)?

But the real question posed by the photos lies in the shot of Jeff (Joel McHale) and Britta (Gillian Jacobs), seemingly re-creating their season 1 paintball hookup from "Modern Warfare."  With the premiere title of "History 101," one would presume the moment to be a flashback, but might things be re-heating up for Jeff and Britta, with a re-staged moment?

Check out the photos below, and don't forget to tune in for the 'Community' season 4 premiere  October 19 on NBC!