David McCallum guest-stars as xeoarcheologist Dr. Vance Hendricks, Dr. Franklin's mentor. Hendricks recelessly endangers the lives of everyone on B5 by smuggling aboard some deadly biotechnological samples from the long-dead planet Ikarra 7. The far-from-dormant samples infect Hendrick's assistant Drake (Marshall Teague), turning him into a unwitting--and indestructable--assassin. Written by J. Michael Straczynski, "Infection" was originally broadcast on February 16, 1994. ~ Hal Erickson, Rovi