Detective Lassiter is on a roll. He's closed nine cases in a row and since he's been on such a hot streak, the department hasn't had to call for outside help, leaving Shawn feeling very unneeded. When a dead body is found on the beach, Lassiter invites Shawn along to show him how it's done. At the crime scene, there is little to go on except puncture wounds on the body. Desperate to get on the case, Shawn looks at the marks and claims he knows who is responsible - a Tyrannosaurus Rex.