Barry (Grant Gustin) and team are surprised when Mon- El (guest star Chris Wood) and Hank Henshaw (guest star David Harewood) arrive on their Earth carrying a comatose Supergirl (guest star Melissa Benoist) who was whammied by the Music Meister (guest star Darren Criss).
The Music Meister (Darren Criss) attacks Supergirl.
However, the Music Meister surprises The Flash and puts him in a similar coma, one that Team Flash can’t cure.
The two-part event will feature Glee alum Darren Criss as the Music Meister, the first look at which you can see right here.