Criss appeared as the Music Meister in the big musical crossover of The CW’s Supergirl and The Flash, which put him back on screen with Melissa Benoist and Grant Gustin for the first time since the end of Glee.
For his part, Darren Criss has done some voice work since the end of Glee, but mostly without song.
Most recently, he reunited with two other Glee alums for more primetime singing.
He voiced the character of Sideswipe in the animated series Transformers: Robots in Disguise.