glee unicorn 1 Sneak Peek: 'Glee' 'I Am Unicorn' pics; Shelby's back!On Tuesday’s (Sept. 27) “Glee,” Rachel Berry (Lea Michele) will again be reunited with her birth mom, ex Vocal Adrenalin coach Shelby Corcoran (Idina Menzel). And, thanks to some just-released pictures, we can give you an early peek at that reunion.

Based on the photos, it looks like mother and daughter will again sing a duet — possibly a song from a certain musical that Rachel mentioned in the season opener.

In other pics, we see Kurt (Chris Colfer) swinging from a scaffold, Blaine (Darren Criss) singing in some super-pegged jeans and Brittany (Heather Morris) wearing some kind of Unicorn-inspired headgear.

glee unicorn 2 Sneak Peek: 'Glee' 'I Am Unicorn' pics; Shelby's back!glee unicorn 4 Sneak Peek: 'Glee' 'I Am Unicorn' pics; Shelby's back!
glee unicorn 3 Sneak Peek: 'Glee' 'I Am Unicorn' pics; Shelby's back!