Back on their case, Shawn drags Gus up to San Francisco to see Robert's ex-girlfriend. She tells them she and Robert broke up because a friend of hers saw him out one night with another girl. He pretended like he didn't know the friend and called himself Martin Brody. Shawn notices she's wearing an engagement ring. She hasn't thought about Robert in a while. She's not their ghost.

On their way back, their car is nearly rammed by another one. The driver crashes and runs away. Gus smells alcohol in the car. Someone was drunk. But Shawn notices another chewed toothpick in the car. This wasn't an accident. They have a new suspect for Robert's ghost.

They go back to see Robert but he's not around. They think the person who tried to kill them might have come after Robert. They search the house for him but instead find a room filled with women's things - including large shoes and a red wig. Shawn's got it. Robert is unaware he has a split personality. He's been haunting himself!

When they finally are able to trigger Robert's other personality, they are only successful after Shawn sees a date book showing an appointment with Dr. Blinn the day he died. He realizes this is the Regina Kane the police have been looking for. They start speaking to Regina and she appears. They realize Regina isn't violent, there must be a third personality. She tells them she was seeing Dr. Blinn but won't tell them why. She has no idea who killed him.

They go to the police to let them know they've found Regina King. While there, they see her patient file. Turns out, she wants gender reassignment surgery. That means ALL the personalities will get it. The third personality - Martin Brody - killed the doctor to protect himself. Shawn remembers Regina has an appointment scheduled with another doctor right now. That doctor's in danger. Shawn, Gus, Lassiter and Juliet rush in, stop "Martin" and save the doctor. Both cases are now solved and Robert is safely in therapy.

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