WATCH: Meet Glee's Coach Sheldon Beiste

The final season of Fox's musical comedy Glee will wrap up its trans-related storyline on tonight's episode, when Coach Beiste returns to McKinley High as the man he has always felt himself to be, after taking some time off to pursue a medical transition.

Coach Beiste, played by out actor Dot-Marie Jones, first came out as a trans man on episode 3, emotionally explaining to assistant coach Sam (Chord Overstreet) and principal Sue Sylvester (out actor Jane Lynch) that "this isn't about who I want to go to bed with, it's about who I want to go to bed as."

In tonight's episode, fittingly titled "Transitioning," the coach returns to McKinley, proudly introducing students and colleagues to Sheldon Beiste. Meet the coach as he truly is in the exclusive clip below.

In true, heart-warming Glee fashion, Beiste is welcomed back by a 200-person trans choir and by the return of the show's first openly trans character, Unique Adams, revived by out actor Alex Newell. Unique leads the choir -- comprised entirely of real self-identified transgender people -- in a powerful rendition of "I Know Where I've Been" from Hairspray. Watch a sneak preview of that song below, and catch the full episode tonight on FOX at 9 p.m.