Shawn and Marlon get involved in another fine mess when they get sidetracked en route to paying their overdue parking tickets and wind up in a holding pen with several tough-looking guys.

After sitting on a staple gun, Marlon borrows Shawn's health-care cards to ensure immediate medical attention for himself, but the brothers' clandestine operation may be exposed when they learn that Marlon's doctor is Lisa's father.