This is a very good episode that brings Jack McGee (Jack Colvin) to center stage and centers around his obsession with finding the Hulk. It's also an episode where McGee shows admiration for the Hulk and doesn't always refer to him as a killer. This was also the only episode that Bill Bixby was not in for the entire 5 season run. They used "flashback" sequences to include Bixby's character and used a disguised stand-in for the one time you see David Banner in the steel mill (no close-up and wearing welding goggles). All in all, the episode is very good due to how it opens up the McGee character the most of any of them.
From a real life perspective, this episode is kind of sad because it marks the beginning of a tragic series of events in Bill Bixby's life. Bixby wasn't available for filming of the episode due to his divorce proceedings with his first wife, Brenda Benet. Bixby and Benet had one son, Christopher. Later in season 3, after the divorce was final, Bixby and Benet did a TIH episode together, The Psychic. They did it for the sake of Christopher to show to him that his mom and dad could still get along. Both this episode and The Psychic aired in 1980. In the winter of 1981, Christopher died while on vacation with Brenda. He was only 6 years old. Then, in early 1982, Brenda Benet took her own life, unable to cope with the loss of her son.
It's been said that Bill Bixby never really fully recovered from these tragic events that happened in relatively short order. I guess that would be understandable.