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

SMALLVILLE (8:00-9:00 p.m. ET) — Episode: “Turbulance”
TESS SETS A TRAP FOR CLARK — Tess (Cassidy Freeman) invites Clark (Tom Welling) to a press conference in New York but when an explosion rocks the private jet they are on, Clark must figure out how to save them without Tess learning his secret.  Unbeknownst to Clark, Tess orchestrated the explosion to get Clark to reveal his powers.  Meanwhile, Davis (Sam Witwer) discovers a surprising way to control the monster within.  Kevin Fair directed the episode written by Turi Meyer & Al Septien (#3T7466).

SUPERNATURAL: (9:00-10:00 p.m. ET) — Episode “On the Head of a Pin”
SOMEONE’S KILLING ANGELS — Someone found Lucifer’s sword and is using it to kill angels.  Castiel (Misha Collins) and Uriel (guest star Robert Wisdom) have captured Alastair (guest star Christopher Heyerdahl) and ask Dean (Jensen Ackles) to use the torturing skills he learned in Hell to extract information from him so they can stop the murders.  Sam (Jared Padalecki) is concerned Dean can’t handle the job but Dean agrees to do it.  However, when Alastair reveals some shocking information, Dean’s world is shattered.  Mike Rohl directed the episode written by Ben Edlund (#3T7516).