Kevin Burkoff becomes a marked man when his research on promicin is discovered. When Tom and Diana search for him, they discover how far he will go to protect his work. Shawn meets his idol at the 4400 Center.

Brandy Heidrick, Conrad Burek, Danielle Kremeniuk, David Milchard, Erin Borgfjord, Grace Sherman, Kathryn Gordon, Michael Kopsa, Nancy Sivak, Neil Hopkins, Richard Kahan