New 'Supergirl' Clip Shows Return of [SPOILER]

The CW has released a clip for "Wake Up," tonight's seventh episode of Supergirl's third season.

In the clip, Supergirl/Kara (Melissa Benoist,) J'onn (David Harewood,) and Winn (Jeremy Jordan) investigate the mysterious spaceship found at the bottom of the National City waterfront. The team finds five cryo-stasis pods inside the ship with one of them empty, and, as you can see in the clip above, the inhabitant was none other than Mon-El (Chris Wood.)

Even from just the short clip, it's obvious that Mon-El's return is shocking and emotional for Supergirl, but the expression on Mon-El's face as the pair see one another again seems to hint that this reunion may not be quite what Kara is hoping for.

"In Episode 7, it's pretty mysterious." Benoist told ComicBook.com during a recent set visit. "I think this season, we've really delved into a different tone, a different atmosphere for Kara. She's really figuring out how to own her alien-ness, if you will, and in turn I think she's finding her womanhood at the same time through grief and that grief is apparent even in the coloring of the show, so I think it's a long-- it won't be the reunion you expect."

The episode won't just see Mon-El return to Earth. It will also see the introduction of at least one member of the Legion of Super-Heroes, Saturn Girl. Promotional photos for the episode give us our first look at the intergalactic superheroine and gives us at least a partial answer to the question of who else is in those cryo-stasis tubes on the mystery ship.

Supergirl airs Mondays at 8/7c on The CW.