Yes, the impact of LA LA LAND can be seen in this musical episode of The Flash (Grant Gustin). This is one of those “cross-over” episodes with Supergirl (Melissa Benoist as Kara Danvers). The episode features a musical crossover with Supergirl and reunites Grant Gustin and Melissa Benoist with their former Glee co-star Darren Criss, who portrays the Music Meister, the Villain of the Week. The story will begin at the end of the Supergirl episode “Star-Crossed” on March 20, 2017, which sees Kara being comatose by Music Meister and Mon-El and J’onn J’onzz / Martian Manhunter bringing her to Earth-1 in hope that Team Flash can save her. Trust me, you don’t have to know the backstory to enjoy the dancing and the music in this episode.
Benji Pasek and Justin Paul, winners of the Academy Award for Best Original Song for providing the lyrics for “City of Stars” in LA LA LAND, wrote another original song, titled “Runnin’ Home to You”, which will be performed by Gustin in this episode. If you’re a fan of singing and dancing, this episode of The Flash should be a fun experience!