Watch Previews Of This Week's <i>Smallville</i> And <i>Supernatural</i>

The CW has released the previews and extended clips from this week's episodes of Smallville and Supernatural, the former promising Halloween-themed goodness (creepy burlap-sack masks!), and the latter a major development in one of this season's mysteries (what the hell's wrong with Sam?).

Smallville: Harvest

Clark (Tom Welling) is concerned about Lois’ (Erica Durance) safety so he diverts her away from covering the Vigilante Registrations Act by suggesting she cover another story.

After he comes clean with her, an angry Lois tells him that she can take care of herself, but when a flat tire strands their car in the middle of nowhere, their plans take a turn for the worse and Lois ends up in serious danger. Meanwhile, Tess (Cassidy Freeman) searches for a cure for Alexander (guest star Connor Stanhope), who is rapidly aging.

Smallville airs Friday at 8 p.m. ET/PT on The CW.

Supernatural: You Can't Handle the Truth

Sam (Jared Padalecki) and Dean (Jensen Ackles) investigate a series of suicides and discover the victims were being told brutal truths that drove them crazy. They find out someone is invoking the Goddess of Truth, Veritas, forcing people to be cruelly honest against their will and Dean is the next victim.

Dean is forced to tell Sam the truth about how he feels about his return from Hell.

Supernatural airs Friday at 9 p.m. ET/PT on The CW.

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