This week, Supergirl crosses over with The Flash for a two-part musical superhero adventure. This is especially exciting for Glee fans, as the stars of both shows, Melissa Benoist and Grant Gustin, are alumni of Fox’s musical dramedy.
Being that they appeared in different seasons, the two never actually shared a scene. Still, Marley Rose (Benoist) and Sebastian Smythe (Gustin) are both fan favorites. Benoist was a series regular, while Gustin was just an occasional guest star.
In anticipation for the crossover, we decided to rank all of Grant Gustin’s performances on the show: