Melissa Benoist Teases That Tonight's 'Supergirl' Centers on Kara & Alex's Bond

Kara is headed back to high school in tonight’s all-new Supergirl.

In the episode “Midvale”, we’ll see Kara (Melissa Benoist) and Alex (Chyler Leigh) head home to Midvale for a little R&R. While there, Kara recalls a painful memory of a childhood friend’s death and how that traumatic experience brought the Danver sisters closer together.

“What’s really fun is you’ll get to see, through the way they interact, more about how their relationship started when Kara first came to Earth, how it grew, how it became so close, and why they’re so close nowadays,” Melissa shared with EW.

Chyler adds that “it’s this mystery that has to be solved, basically, and they have to work together, and so you really do get a better sense of seeing what that looked like and how they had to figure things out and quickly.”

“We only got bits and pieces of that that we’ve seen in flashbacks in the past seasons, so this is one [episode] that’s really cool,” she adds. “I think the tone is going to be really different.”

Supergirl airs TONIGHT @ 8PM ET/PT on The CW.