A Voice from the Past - S1.E10

Autumn 1908: While providing food for the homeless, James and Elizabeth are surprised to run into Sara whose been living on the street. Elizabeth insists on taking her back to Eaton Place where she's given a job as a scullery maid. Sarah immediately reverts back to her old tricks and, claiming to be a medium, causes an uproar when she tries to conjure up the spirit of Emily during a seance.