The voice of Zzzax was performed by three actors simultaneously: Michael Bell, Leeza Miller McGee and Kevin Schon.
Peg, the female lab worker with the short brunette hair and white lab coat resembles the character model used for Betty Ross in the earlier Hulk series "The Incredible Hulk (1982)." Additionally Peg shares the same name as Peg Dixon who voiced Betty Ross on the Hulk segments of the 60's "The Marvel Super Heroes Show".
Mitch McCutcheon is voiced by Michael Bell who previously had played Dr. Bruce Banner in The Incredible Hulk (1982) an earlier unrelated series.
The Hulkbusters make their first appearance in this episode. They were commissioned in the previous episode The Return of the Beast: Part 2 (1996).
In this animated version of Zzzax is Mitch McCutcheon, a nuclear power plant worker who attempts to help Bruce Banner in curing himself of the Hulk, but gets turned into Zzzax from a machine explosion.