CBS's new Supergirl TV series is casting characters all over the place! These two newest addition may take the Kryptonian cake, though — Dean Cain, who played Clark Kent in Lois & Clark: The New Adventures of Superman, and Helen Slater, titular star of the 1984 Supergirl movie, are joining the series.

Deadline on sales the two will be playing "mystery roles," so let's start speculating wildly and irresponsibly now. Seeing as they were announced together, and the stunt casting benefits of two former Super-stars (so to speak), I'm thinking they're playing Kara/Supergirl's Kryptonian parents — maybe in a series of flashbacks, or maybe Kara has a hologram machine that allows includes home movies from the House of El.

That's not that wild or irresponsible a speculation, actually. Huh!