A behind-the-scene photo posted by a Glee cast member reveals a black Grizzly bear that suggests a possible wildlife theme.

The sixth and final season of the musical drama that has smitten millions of fans around the world, and launched the careers of Lea Michele, the late Cory Monteith, Dianna Agron and Naya Rivera, and will surely give fans something to look forward to.

The anticipation of the show's sixth season intensifies as Glee star Max Adler shared a photo in one of his social media accounts, with the entire cast seemingly enjoying the shoot with the bear.

"Had a BEARy good time filming @GLEEon FOX with these wild animals yesterday!" wrote Adler, who plays the bully-turned-homosexual, Dave Karofsky, in the series.

Other co-stars in the photo are Chris Colfer, Lea Michele, and Darren Criss.

The photo raised speculations around the concept of that particular scene which Glee is filming.

Several reports indicate that the show could be doing a wildlife-themed episode to raise awareness on animal protection. Others think that the wild animal could be a part of a sub-plot, in which one of the stars in Adler's photo could be adopting a wild animal.

The bear signifies Glee's desire to continue to push standards with their storytelling and bring surprises that endear them to countless of followers around the globe.