Medium - Season 1 Episode 12 -

Allison accompanies D.A. Manuel Devalos to the State prison to witness the execution of a man he personally prosecuted. Several hours later, the supposedly dead man's girlfriend is killed and he is seen in their house. The newspapers are soon filled with stories of a revenge-seeking ghost but Allison finds a far more Earthly solution to the puzzle. Ariel meanwhile develops a crush on her science project partner Sean Bertoni. Allison feels there is something terribly wrong however and when she has a vision of the full story, offers the boys mother Sarah her help.