Barry gets all the heroes together to take on aliens. Most of them get brainwashed, but Barry tricks Supergirl into stopping it. (Future) Barry’s message from Legends of Tomorrow is to not trust (Young) Barry. Uh-oh.
The CW has somehow avoided cramming pretty much the entire Arrow-verse into one glorious scene up until this point, but all that is about to change. Supergirl, meet the Arrow-verse. Arrow-verse, meet Supergirl.
The new season is really kicking off in earnest, and we have premieres from half of The CW’s superhero slate hitting this week. Along with Flash and Arrow, new sci-fi shows like Timeless and Frequency are also making their eagerly awaited debuts.