Jonathan Groff is returning to Glee as the new coach of Vocal Adrenaline.
Glee Project runner-up Lindsay will also be coming back to the show in Episode 8 and plays the role of being the ‘Rachel Berry’ of her school. Glee Project co-winner Samuel is coming in at Episode 10 or 11.
It appears Alex will come in as a member of Vocal Adrenaline.
Source: E! Online