Supergirl type TV Show network The CW genre Superhero Where to watch Close Streaming Options

Jeremiah Danvers returns during Monday’s episode of Supergirl — but not everyone will be happy about that.

Kara (Melissa Benoist) and Alex (Chyler Leigh) are divided after Jeremiah (Dean Cain) suddenly and mysteriously returns from Cadmus. After all, Kara had basically rescued Jeremiah when she, herself, was trapped in Cadmus, but he declined to leave with them. So why is he here now?

“Immediately, it’s just a joyous occasion that I think blinds them to a threat there because he was gone for so long that they don’t know what happened to him while he was with Cadmus, so there’s conflict,” Benoist says. “One of them is adamant that he’s innocent, and that he wouldn’t do anything to hurt anyone. The other is more suspicious, so there’s some butting heads.”

It’s probably not hard to guess which role each of the sisters take. “They haven’t seen Jeremiah in over a decade, so Alex almost goes back to seeing daddy again,” Leigh says. “They’ve wanted to find him, so the prospect of it actually happening and then him coming is this crazy, emotional, amazing ride.”

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But it’s unclear whether Jeremiah can be trusted, with Mon-El (Chris Wood) being the first to actually point that out. “Mon-El is more suspicious about Jeremiah coming back, and that pushes Kara into going, ‘OK, he raises some questions,'” Leigh says. “Kara says, ‘Maybe we need to vet this out a little more before diving straight in,’ but Alex is like no holds barred, she’s like, ‘No, dad’s back, this is it, family is family, ride or die.’ It does divide them a bit because Alex believes so wholeheartedly that he’s completely innocent and just wants to be a part of things.”

Jeremiah’s return provides for a sweet family reunion, in which both Alex and Kara are able to introduce their respective significant others — which is especially daunting for Alex. “It’s one of these moments where you see Alex, one by one, having to cross this road and see how people react,” Leigh says. “She hasn’t seen him in over a decade and, ‘Guess what? I’m gay!’ It’s great. His reaction is so wonderful. It’s a great, sweet, endearing moment: ‘OK, I’m being accepted for where I am.'”

Image zoom Dean Buscher/The CW

Whether Jeremiah can be trusted or not, Cadmus is still very much a lingering threat. “There’s continuing attempts to just rid the planet of aliens — mass exodus of anyone that’s different on Earth, they want them out,” Benoist says. “Their threat is really ominous, and also, I think, quite relevant to things that are happening in the world, which I’m proud of this show for. Lillian Luthor is a constant dark cloud over National City for everyone at the DEO.”

Supergirl airs Mondays at 8 p.m. ET on The CW.