Ranking Each Arrowverse Crossover From Worst To Best

Undoubtedly the most left-field crossover on a conceptual level, this Supergirl-Flash crossover/mini Glee reunion was able to shake off any potentially eye-rolling moments and reached entertaining heights. This was due to the presence of a surprising number of talented singers in the cast of the Arrowverse's series, as well as a knowingly playful approach to the crossover's proceedings.

Musical hijinks ensue when extra-dimensional entity the Music Meister 'attacks' Supergirl and the Flash and places them in a hypnotic trance that resembles a Golden-Era Hollywood musical. The characters in this realm are based on actual Arrowverse mainstays such as Malcolm Merlyn and Iris West, and this gives the actors the opportunity to flex their musical chops.

At the heart of this crossover is Barry and Kara's respective relationship woes, as well as their strong friendship. It also helps that it is a relatively light hearted affair that gives viewers room to breathe in the midst of some rather heavy seasons.