Tonight, The Flash will return to the CW after a couple of weeks off, but next week fans will be able to see him on multiple networks as he heads his own shown and teams up with Kara Zor El on CBS’ Supergirl.

I’m looking forward to this, but the episode’s description confirms something I was a little worried about. When Barry first went to Earth 2, you can see Supergirl as one of the images they fly past in their dimensional tunnel. Now it really does look like they’ve decided to keep Supergirl separate from the CW’s DC universe by way of a Multi-verse.

Kara gains a new ally when the lightning-fast superhero The Flash suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home.