'Downton Abbey' Season 5 Trailer Teases Secrets, Hookups, and Fire (VIDEO)

The fall is just about here, and you know what that means: a new series of Downton Abbey! (Well, to fans in the UK, anyway)

So what's in store for Series 5 (or Season 5, if you're in the U.S.)? Well...change, it looks like. And lots of it, judging by how everyone seems to be guarded and nervous about the possibility of things not remaining exactly as they have been for the past couple of seasons. Of course, this would be to ignore that things were never really all that great for anyone in Downton in the first place. Whether it was war, preeclampsia, rape, death, miscarriages, or even the post-coital death of a Turkish diplomat, there's always been some crazy, funky-ass mess happening at ol' Downton Abbey. So that just leaves us to figure out what could possibly happen this season that will top all that.

From the looks of it, a lot: there's a fire, a lot of talk about "secrets", and some possible hookups in the works, as Jimmy Kent is in bed with somebody (and those don't look like servants' quarters!). Meanwhile, Mary seems to be finally moving on from Matthew with Anthony Gillingham. But is her happiness going to last? Watch the full trailer below, and get hyped for the premiere of Downton Abbey Series 5 on Sept. 21st at 9pm on ITV.