The Stand (1994) Season 1 Episode 3

Hundreds are now in Boulder, Colorado with Mother Abigail but Randall Flagg has sent Nadine Cross to infiltrate the group. Unable to seduce Larry, she then sets her sights on Harold. But just as the citizens begin to organize their lives, Mother Abigail leaves Boulder. The residents do become concerned about what Randall Flagg, based in Las Vegas, may be up to and decide to send three people west to find out.