Don't Dream It's Over - S1.E8

A restless Mark is disturbed by his continuing dreams where he falls in love with Mary Jane, a mysterious beautiful woman from 19th-century London who also sees Mark only in her dreams. Ignoring Elmer's stern advice to stop his dalliance or risk his own destruction, a sheepish Mark asks love struck Marian to help him channel through to his would-be lover. Then an Internet search by Miles reveals that Mary Jane Kelly was the last victim of Jack the Ripper.