This episode features Tim Curry's only appearance on the show where he plays a character other than Skullmaster.
When the aliens beam up Max, Norman, Virgil and Nahmo, the outline of Norman's sword is seen in the energy field around them before he's actually holding it in that spot.
It's revealed that Norman was once the Greek hero Hercules.
When Norman runs up to the ruins where he finds the Bellows of Hephaestus, the weapon he needs to win the second test, he says, "It's just as the ancient ones foretold!" However, the gist of the conversation he'd had with Virgil about the nature of the weapon needed to beat the second test was that the ancients hadn't provided specifics on what it is or where it is.
One of Conqueror's invocations is, "By the sword of Zeus..." Zeus never had a sword, he used lightning bolts as weapons.
The hilt design on Norman's sword changed later in the series; in early episodes the crossbar usually has an H-like shape, in later episodes it tends to have a more U-like shape. Sometimes it changes just between subsquent shots, like in this episode where it has the H-shaped hilt while twirling through the air after Conqueror knocks it away in the first test, but then it has the U-shaped hilt in the very next shot, where it embeds itself in Virgil's calculations.
Norman's sword was knocked out of his hand during the first test, it was suddenly back in its scabbard when he drank from the Cup of Apollo, then it was gone again when he put the cup back.
It was day in Max's town, in Greece, Australia, Mexico and the other places Max visited all at the same time.
How did Warmonger and Skullmaster get back to Skull Mountain? And how did they get back out later? Can they suddenly travel through the portals?
Portals stay fixed in one location, and Max was summoned to Zero Island through a portal that the plane he was on was flying through at that very instant. Yet when the heroes escape the island it's back through the same portal and into the same plane. The plane would have been a significant distance away from where Max had gone through it by then.
When Virgil remarks that vampires can't cross running water and that Moska must have been destroyed, Max says "Hello, Virgil! News flash! The garlic didn't work, neither did the mirror." Virgil wasn't there when they didn't work however, and wouldn't have known that. It's kind of odd also that Virgil seemed to think nothing of Moska sprouting insect wings and spitting acid--not abilities documented in legends of classic vampires.
Max and company captured three of the cultists and took their robes to sneak into the castle. They stole them from three fairly averagely built men but the robes perfectly fit an eleven year old boy, a three and a half foot tall fowl, and a man who must be at least seven feet tall with broad shoulders.
When Zygote transforms into the Lemurian-like creature, the wires that connect him to the machine disappear, seemingly turning into a mustache. They are not seen for the rest of the transformation, even when he turns into a pure thought. Though before the final evolution, Zygote again pulls those wires out of the machine.
In the end, Zygote is pure thought. He has immense abilities and has evolved beyond the infinite... Yet for some reason, when he wants to get out, he has to open a window. How could the glass hinder him in that state?
Skullmaster cuffs the monk by both ankles, but when he drops the monk he only opens one cuff.
In the episode, "Rumble in the Jungle," Norman pushes over a gigantic stone head, yet in this episode he's unable to budge a significantly smaller boulder. The boulder also seems to get about twice as big between Goar picking it up and when it lands in the cave entrance.
Goar hits the boulder they use to seal the cave mouth, presumably to make sure it'll hold the saber tooth tiger, and nothing happens. But the tiger is supposed to be equally as strong as Goar, and explodes through the boulder with no trouble whatsoever.
An eleven year old boy, his mother, a three and a half foot tall fowl, and two huge men can all fit it in the taxi at once? That's one roomy backseat.
A billboard seen during the baseball game advertised the 1998 Winter Olympics, which took place in Nagano, Japan 4 years after the episode aired.
When Felix picks players for his baseball team, his voice sounds very different from usual.