Duet (II)
The Flash · Season 3 · Episode 17
Barry and team are surprised when Mon-El and Hank Henshaw arrive on their Earth carrying a comatose Supergirl who was whammied by the Music Meister. Unable to wake her up, they turn to Team Flash to save her. However, the Music Meister surprises The Flash and puts him in a similar coma, one that Team Flash can't cure. Kara and Barry wake up without their powers in an alternate reality where life is like a musical and the only way to escape is by following the script, complete with singing and dancing, to the end. The crossover starts on Supergirl S02E16 Star-Crossed (I).
Season 3
- Episode 1 · Flashpoint
- Episode 2 · Paradox
- Episode 3 · Magenta
- Episode 4 · The New Rogues
- Episode 5 · Monster
- Episode 6 · Shade
- Episode 7 · Killer Frost
- Episode 8 · Invasion! (II)
- Episode 9 · The Present
- Episode 10 · Borrowing Problems from the Future
- Episode 11 · Dead or Alive
- Episode 12 · Untouchable
- Episode 13 · Attack on Gorilla City (1)
- Episode 14 · Attack on Central City (2)
- Episode 15 · The Wrath of Savitar
- Episode 16 · Into the Speed Force
- Episode 17 · Duet (II)
- Episode 18 · Abra Kadabra
- Episode 19 · The Once and Future Flash
- Episode 20 · I Know Who You Are
- Episode 21 · Cause and Effect
- Episode 22 · Infantino Street
- Episode 23 · Finish Line