Tonight on The CW: Smallville and Supernatural

We’re heading for two huge season finales and both Supernatural and Smallville are stacking the deck with episodes about the true nature of evil. Are we born to be bad, or is it something we can control? Both Davis Bloome and Sam Winchester have done their best to keep their dark sides in check but are they simply postponing the inevitable?

First, at 8:00, it’s Smallville “Injustice.”

Chloe (Allison Mack) returns and begs Clark (Tom Welling) to kill Davis (Sam Witwer), claiming he can no longer keep the beast under control. Tess (Cassidy Freeman) has assembled a team of meteor freaks, including Plastique (guest star Jessica Parker Kennedy), to track down Davis so Clark can kill him. However, things get out of hand once Tess’ team discovers she is double-crossing them. Erica Durance, Aaron Ashmore and Justin Hartley also star. And hey, look! It’s Brendan Fletcher who played Max in “Nightmare” on Supernatural.

(Tom Welling as Clark Kent, Brendan Fletcher as Parasite . Photo: Michael Courtney/The CW ©2009 The CW Network, LLC. All Rights Reserved.)

Next at 9:00 it’s Supernatural “When the Levee Breaks.”

Dean (Jensen Ackles) and Bobby (Jim Beaver) lock Sam (Jared Padalecki) in Bobby’s panic room so he can detox from the demon blood.  However, as Bobby sees more seals are being broken he tells Dean they should let Sam out to help them fight the impending apocalypse.  Dean disagrees and goes to Castiel (Misha Collins) for help.  Sam and Dean have a big blowout confrontation. (Jared Padalecki as Sam. Photo: Michael Courtney/The CW©2009 The CW Network, LLC. All Rights Reserved.)

Can Davis be saved? Can Sam be saved? Sounds like it’s going to be a long, hard night for everyone including the good guys.