Welcome to the first ever, epic, Flash-Supergirl-Legends-Arrow musical crossover episode! Did anyone actually get to join in from Arrow? Malcom Merlyn/John Barrowman was an Arrow character until he moved to Legends this year, so we’ll count him. This is a reunion of all sorts, with Grant Gustin, Melissa Benoist, and Darren Criss/Music Meister having starred together on Glee, various combinations having gone to college together, and others knowing each other through previous work or longtime friendship. Fun times all around.
Previously on The Flash and Supergirl, Kara broke up with her boyfriend, Mon El, because she found out that he’s actually the Crown Prince of Daxam, rather than a lowly palace guard as he’d originally told her. Her planet, Krypton, has always hated Daxam, its sister planet. The Kryptonians inadvertently destroyed Daxam, as well, when they destroyed their own planet, through their own environmental arrogance. Despite the fact that Mon El has a much better reason to hate Kara than she does to hate him, she continues to find reasons to nurture her racism while telling herself it’s in the name of truth and justice. It’s all very alt-right, while supposedly being feminist. Except the word feminism doesn’t mean what the Berlantiverse thinks it means.