Psych: Season 3, Episode 7

3 - 7: Talk Derby to Me

Juliet goes undercover as a roller derby skater after Shawn deduces that a string of robberies have been committed by one of the teams. The case takes a turn when one of the robbers (Mickie James) botches a drop, and Shawn deduces that the robberies were a cover for something bigger. In the meantime, Gus is studying to get re-certified for his pharmaceutical sales job.