Supergirl Surprised Lucy Lane Is Investigating DEO In First Manhunter Clip

CBS has released the first clip from the next Supergirl episode: "Manhunter."

After Martian Manhunter (J'onn J'onzz) revealed he's been disguising himself as DEO Chief, Hank Henshaw, the Pentagon orders a joint task force to investigate his infiltration of the agency. And now that Lucy Lane (Jenna Dewan-Tatum) resigned from CatCo, she's back with the military and is leading the investigation.

Watch the sneak peek in the video below.

In the episode, J'onn J'onzz reveals the details of meeting Kara and Alex's father, Dr. Jeremiah Danvers (Dean Cain), and assuming Hank Henshaw's identity. Also, Kara debates trusting someone new with her secret identity and Siobhan (Italia Ricci) plots against Kara.

Check out the photos in our gallery at the bottom of the page.

"Manhunter" episode of Supergirl will air Monday, March 21 at 8 p.m. ET/PT on CBS.