The Doctor's creator, Lewis Zimmerman, is dying in the Alpha Quadrant from a disease similar to the Vidiian phage. The Doctor's matrix is transferred to Zimmerman's lab on the Jupiter station, to assist Mr. Barclay and Counsellor Troi in attempting to treat the illness.
Air Date: 05/10/00
Director: Terry Windell
Marvelous episode with nice twists and some really great guest appearances and incredible dual acting by Robert Picardo.