Ep 30. House of Spirits

When medium and psychic, Quentin Warburton, is shot by a floating gun, Tessa and Steve are told by witnesses that the killer was Arthur Pitman. Unfortunately, Arthur has been dead for three years. In order to unravel the mystery surrounding Warburton's death, Tessa and Steve have to work out how Warburton convinced the Pitman family that Arthur returned in spirit to kill him.