James Marsters

Smallville (7 p.m. on 62) : Brainiac (James Marsters) lets loose a deadly virus that could take millions of lives.

There’s a vaccine, but he won’t give it up unless Clark (Tom Welling) releases General Zod. Clark seeks help from Lionel (John Glover), who channels Jor-El for him.

Lex (Michael Rosenbaum) reveals his new powers to Lana (Kristin Kreuk).