It's sad, but true: Glee concludes its amazing first season on Tuesday.

We already know that Rachel and Finn will serenade the crowd at Regionals with a Journey classic on the episode - but what else can fans expect from it?

The following Fox promo, along with a set of photos from "Journey," should give fans a good idea heading into Tuesday night. Watch, click and enjoy...

[video url="http://www.tvfanatic.com/videos/glee-finale-promo/" title="Glee Finale Promo"] [/video]

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