The Eyes of Lazarus - S1.E6

The evil spirit of a dead mad anarchist, Lazarus, takes possession of Passepartout at a seance for Passepartout's recently-deceased Aunt Louisa. Lazarus, who died at the hands of Phileas, is intent on returning the favor. When Passepartout is thought mad and committed to an asylum, the spirit of Lazarus passes to Rebecca. With the help of the spirit of Aunt Louisa, Lazarus is banished before his evil plan is accomplished.