While Watson and the team help a woman whose memory resets every three minutes, Watson struggles with auditory hallucinations and questions whether someone is behind his current decline. Also, Moriarty plots his next move.

Ingrid's lies come back to haunt her when her sister Gigi needs to be treated by the team after she develops side effects to the secret treatments Ingrid put her through. Also, Watson and Mary bond over a tragedy.

Watson is thrown into a detective case when he is unsure whether the patient he is treating for one of the most rare ailments in the world, Alien Hand Syndrome, is guilty of pushing his brother in front of a bus to his death.