Grant Gustin will reprise his role as the Dalton Academy Warblers singer, who had a crush on Blaine last season.
Sebastian will enroll back to Dalton Academy on "Glee". After being absent since the beginning of the show's fourth season, the openly gay member of Warblers, played by Grant Gustin, will rejoin the pack for a few episodes starting in November.
Sebastian made his first appearance on the musical series in the fifth episode of season 3 as a new frontman of the Warblers. He was deemed the No. 1 villain at the time since he came in between Blaine and Kurt's then-blossoming relationship.
It's unclear if Sebastian still has a crush on Blaine when he returns, but Blaine himself is currently available after splitting from Kurt in "The Break-Up" episode. One thing for sure, Sebastian will no longer be the Warblers frontman since the show has cast Nolan Gerard Funk in the role.
The "House at the End of the Street" actor's character is called Hunter and his first goal is to lure Blaine back into the fold in an attempt to win the national championships. He will make his debut in the seventh episode which is slated to air on November 22.
"Glee" is currently in hiatus and will return with a new episode titled "The Role You Were Born to Play" on November 8. The episode will mark the return of Mercedes (Amber Riley) and Mike (Harry Shum Jr.) after they were last seen in season 3 finale.