Metallo is wreaking havoc on Metropolis and National City, so Supergirl and Superman team up to take him down. Kara gets injured; Superman is upset the DEO keeps Kryptonite around; and Cat Grant leaves town.
The first season of Legends of Tomorrow was a lot of fun, but also a total mess. Stories that could’ve been wrapped up in an hour stretched into two-parters, while the interesting arcs were crammed into an episode or less. The season-long narrative of hunting down Vandal Savage also left a lot to be desired.