Now that Supergirl has saved Earth-1 from alien invaders — with help from Arrow, The Flash and DC's Legends of Tomorrow, of course — she's back to defending National City. 

Check out the trailer above for her mid-season return, airing on The CW January 23 at 8 p.m. ET.

And if you missed the recent four-episode Invasion! crossover event, you can watch it on cwtv.com or The CW App