’The Flash’ Season 3: What We Know So Far

#8 – A Musical Crossover With Supergirl In 2017

As revealed at the Television Critics Association Summer Press Tour, we will see for the first time in live-action superhero TV, a musical crossover between this show and Supergirl. According to Greg Berlanti, show-runner and executive producer of both shows, it will be probably episodes 13 and 14 in 2017 that the musical crossover is happening. He has been teasing that they are aiming to do at least one original song, if not more. We assume at that point that Kara and Barry will be on the same Earth after the 4-show crossover event.