In the second episode of the four-part story "Arc of Infinity," the renegade anti-matter creature (Ian Collier) has overtaken the titular Arc as part of an overall scheme to pass over into normal matter. Crucial to the villain's plan is to adopt a physical presence, and thus, the renegade bonds with the Doctor (Peter Davison), making him a huge risk to the well-being of the universe. First broadcast on January 4, 1983, "Arc of Infinity, Episode 2" was written by Johnny Byrne. ~ Hal Erickson, Rovi