Season 2: Episode 26: Drug Testing

When Dwight (Rainn Wilson) finds half a joint in the Dunder Mifflin parking lot, he puts on his Volunteer Sheriff's uniform and launches a full investigation -- prompting Michael (Golden Globe winner Steve Carell) to ask for an unusual favor. Pam (Jenna Fischer) playfully issues a challenge to Jim (John Krasinski) and he does his best to follow through with it. B.J. Novak , Leslie David Baker, Brian Baumgartner, Kate Flannery, Angela Kinsey, Oscar Nunez, Phyllis Smith, Melora Hardin and David Denham also star.