Andy reunites with his a cappella group while Dwight deals with a drug scandal.

Escaping a magnetic field in the office, the gang spends the day on a work bus.

Andy's newfound blood relative connection to Michelle Obama causes quite a stir around the office.

Pam and Jim attend Roy's wedding, while Nellie and Dwight match wits and Clark makes a move on Erin.

A newly empowered Andy takes charge, dealing with a defiant Nellie and two new staffers.