• Michael Cudlitz, Tech Sgt. John Ayre, Staff Sgt. Spencer Stone, Dean Cain, Staff Sgt. Johnathan Gales and Caroll Spinney onstage at the Wizard World Sacramento Honors Hometown Heroes event at the Sacramento Convention Center on June 17, 2016.

Michael Cudlitz, Tech Sgt. John Ayre, Staff Sgt. Spencer Stone, Dean Cain, Staff Sgt. Johnathan Gales and Caroll Spinney onstage at the Wizard World Sacramento Honors Hometown Heroes event at the Sacramento Convention Center on June 17, 2016. (Photo : Getty Images/Kelly Sullivan)

Dean Cain will appear again as Jeremiah Danvers in "Supergirl" Season 2 episode 15 titled "Exodus." The actor played Clark Kent/Superman in "Lois & Clark: The New Adventures of Superman" from 1993 to 1997.

"Exodus" will be the sixth "Supergirl" episode that features Jeremiah, the father of Alex Danvers (Chyler Leigh) and the adoptive father of Kara Danvers/Supergirl (Melissa Benoist).  In the episode, Alex and Kara will have to break the rules.

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The sisters are in a mission to stop the most recent plot of Cadmus, the research lab currently led by Lillian Luthor (Brenda Strong). Kara investigates a series of alien kidnappings while Alex searches for their father.

To help stop Cadmus, Kara will have to Snapper Carr (Ian Gomez) to run a story. She will agree to set up an interview between Snapper and Supergirl.

"It's hard because when they realize that there's a deeper issue going on with Jeremiah, you don't really know where his loyalties lie," Leigh told Entertainment Weekly. "When that's questioned and Alex gets put in a position where she's questioning it, it becomes this deep, dark intense realizing, her coming to grips with the fact that this isn't in her control."

Leigh described "Exodus" as a "really powerful episode." She revealed that Alex will go head-to-head with Lillian.

Directed by Michael A. Allowitz, "Exodus" will air on The CW on March 6, Monday, at 8 p.m. Watch the trailer here: