The large, flightless bird at the beginning of the episode remains unidentified, but appears to be the same species as the one seen in "After-Shock".

The pack of carnivorous theropod dinosaurs called T'Arga by Lok appears to be the same species as Konga, seen in "What Goes Up". John referred to Konga as a T. rex, but it couldn't be since it had three claws on its forelimbs, as these do; here he calls them allosaurs instead, which is a more accurate description.

The bird seen at 1:25 on the DVD may be an Archaeopteryx.

The pterosaurs seen at 3:28 on the DVD appear to be Pteranodons.

This episode introduces the Sky People, led by Krona, enemies of Gorok's village who live on the other side of the valley. The two tribes seemingly become friends by the end of the episode.

Why doesn't Gara remove the unconscious K'Tem's headdress while she's treating him? Maybe the Sky People have a tradition of wearing them at all times and would be offended if it was removed; notice that all the Sky People wear them.

Gara uses a plant called zin-zin to treat K'Tem's fever. 

At 7:51 on the DVD, the background of the scene has suddenly changed from what it was just seconds earlier. And notice that Greg and Tana are now standing off the bottom edge of the background plate!

Tana and Greg are reassigned from the catapults to find the zin-zin leaves needed for Gara's medicine. Running through the jungle, Tana begins leading Greg to the location of the plant. After a bit, Greg asks how much farther it is and exclaims that he's bushed and sits down for a rest. Yet, just a minute later, a T'Arga comes nearby, threatening their safety and John and Gorok, back at the catapults, are able to hear it and shoot a boulder in its direction, which lands right in front of the beast, scaring it off. Greg and Tana couldn't have gone far if the catapult was still able to fling a boulder to their location, so why does Greg act as if he's been running for some time?

Greg, Digger, and Glump rest themselves on large plants called clome. Apparently the plant is capable of making a person feel ticklish at a mere touch.

It seems that Tana has learned some English because when Greg asks her what "clome" means in English, she responds that it means "ticklish". (Even though all the characters are depicted speaking English throughout the series for purposes of the television viewership, I have assumed since the study of "Forbidden Fruit" that the Butlers have learned to understand and speak the language of the cave-dwellers and that is what is really intended to have been spoken normally.)

When Greg and Tana return with the zin-zin leaves, they are carrying it in two large baskets. Where did the baskets come from? They didn't take any with them!

While calling upon the "gods" to bring a message to Krona, John uses the phrase "Hocus pocus, diplodocus." The phrase "hocus pocus" is frequently used by magicians when performing tricks. The origin of the term is obscure and has been used at least since the 17th Century. It was probably meant to sound Latin. "Diplodocus" is a reference to the genus of sauropod dinosaur called Diplodocus; John knows the natives of the valley will have no idea what the word really means.

It is highly unlikely that John's simple tree catapults could hurl boulders the distance they do here. The boulders are depicted soaring over a large expanse of ground and over a mountain range to strike near the home of the Sky People. The catapults also seem to have an uncannily accurate aim over such a distance!

Somehow Gorok is able to reach the home of the Sky People just minutes (less, really) after having fired the three catapults towards them from the other side of the mountain range!

As the T'Arga pack is driven off by the catapult near the end of the episode, John seems to be both on a hilltop acting as lookout for the beasts and helping to man the catapults at the same time!

As the gag at the end of the episode, Digger is accidentally sent aloft by one of the catapults. Somehow, he just happens to land in a pond to cushion his landing. Frankly, he should be dead! Some joke.

Unanswered Questions

Did the Sky People ever learn of the catapults contrived by John for Gorok's people? If so, might they not realize they were deceived about the heavenly fireballs falling from the sky and resume hostilities?

Memorable Dialog 

I know your ideas.wav

hocus pocus diplodocus.wav