ReGenesis Season 2 Episode 4 Dim & Dimmer

While attending a conference in New York, David chases Owen a petty thief into the city's abandoned subway tunnels where he finds an underground community of homeless people. David discovers that some of the inhabitants share symptoms of a mysterious illness and he begins to investigate.

Back at NorBAC, Jill believes that she has discovered a cure for juvenile diabetes from an unsanctioned line of stem cells.

Caroline's nephew Glenn who has been lying in a coma is beginning to show some signs of response.