Starting at 8 p.m. tonight, the CW offers new episodes of “Smallville” and “Supernatural.”

SMALLVILLE: (8:00-9:00 p.m. ET) — Episode: “Eternral”
DAVIS BLOOME’S HISTORY IS REVEALED — Tess (Cassidy Freeman) tries to kill Davis (Sam Witwer) by blowing up his truck. However, after he escapes, she realizes she needs help to destroy him and turns to Clark (Tom Welling). Tess reveals Davis’ secret childhood with the Luthors and hints that she knows Clark’s true identity. alex ferrisMeanwhile, Davis runs to Chloe (Allison Mack) for help. Posted on KryptonSite. James Marshall directed the episode written by Brian Peterson & Kelly Souders (#3T7468).

https://www.youtube.com/watch?v=DoEEPEUDmlQ

SUPERNATURAL: (9:00-10:00 p.m. ET) — “Monster at the End of the Book”
A VERY META SUPERNATURAL — Sam (Jared Padalecki) and Dean (Jensen Ackles) are shocked to discover a series of comic books titled “Supernatural” that accurately detail their lives as demon hunters. They track down the writer, Carver Edlund (guest star Rob Benedict), who explains he has visions of the brothers that he then turns into comic books. Chuck reveals that Lilith (guest star Katherine Boecher) is coming and she has a plan for Sam. Mike Rohl directed the episode written by Julie Siege.

https://www.youtube.com/watch?v=JLHzxzS7dr0