Rookie Blue is preparing for a scavenger hunt.

Following a season three premiere that featured William Shatner, along with a returning-to-work Andy, this ABC summer series moves ahead next Thursday with "Class Dismissed."

The episode focuses on a series of pranks among officers, along with the theft of an armed car. This crime will lead Andy and Sam to a violent teen who assaulted a local, notorious criminal. Can they track him down before anything worse goes down?

Watch the official teaser now:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.