Adventures of Superman

Ironically, this being the last episode of the series, we finally find out the science behind what causes the effects of Kryptonite on Superman (as explained by Prof. Pepperwinkle's theory of negative and positive Kryptonite charges).

There were plans announced in June of 1959 to do a seventh season of twenty-six new Superman episodes. John Hamilton, who played Perry White, had passed away in the fall of 1958 and they were going to replace him with Pierre Watkins who had played Perry White in the 1940's Superman serials which also starred Noel Neill as Lois Lane. Unfortunately, just a few days after this announcement on June 16, 1959, George Reeves died of a gunshot wound to the head. It was listed as an apparent suicide although there are some who believe he was murdered.

When the burro reads Jimmy's mind to determine his age, we find out that he's 22 years old.

You'll notice that when Superman is talking to the burro and she answers his questions with a "yes" or "no" head gesture, Superman is actually pulling on her harness to force the gesture.

Lois says "With Clark still missing we're a bit shorthanded on this flying burgular story, but "Mr. "Kent's" trying to get ahold of Jimmy, take him off the feature until Clark gets back", It should have been "Mr. White's".

ILLOGICAL: First of all, is it even possible to go down 250 feet of water when you're off a pier that close to shore? And secondly, why didn't Superman react faster to getting them out of the bathysphere the moment the door closed in on them? He actually waited until the thing submerged.

Goof: When the bathosphere sits on the bottom of the harbor, 250 feet below the surface, with Perry White, Jimmy, Lois and Superman you can see Goldfish swimming outside through the window.

This episode marks the final appearance of recurring actor Ben Welden portraying a criminal.

The Mr. McTavish robot costume had been used 4 years earlier as Gorog for the movie The Bowery Boys Meet The Monsters.