David (Bixby) impersonates a physicist in order to get access to a nuclear testing facility in which he intends to use a gamma-ray gun in the hopes of reversing his troublesome side-effect. But before he can complete the process, the suspicious scientist (Jackson) and an untimely earthquake stymie his plan, pitting a small group of survivors against the clock as they struggle to find a way out of the nuclear-enhanced maelstrom.
Two reasons to tune in: a lengthy earthquake scene (punctuated briefly by some concerning stock footage that shows a vehicle tumbling off a collapsing highway - hopefully unoccupied), and perhaps more significantly, one of the last screen appearances (to date) of bombshell Sherry Jackson. Here, Sherry shapes up as David's lab boffin equalizer as the two trade techno-talk sizing the other up on their nuclear fission (or is it fusion) factoids - curiously, the usually well-equipped David is found wanting.
The escape from the wrecked facility is the perfect vehicle for big Lou to flex his pecs, though without the traditional antagonist to goad the green man from his mild-mannered alter-ego, the Hulk-outs are borne more from panic than anger. Nevermind, there's still Sherry Jackson.