It may be intensely silly to complain about a continuity error in a story about a time paradox, but it’s always bothered me that the Marshalls discover that the Sleestak have a dormant season in this episode, when they already knew about it four shows earlier and they watched that season come to an end when the underground lava pit rises. Yet this is clearly intended to be the series finale; kids shows never had “final episodes” back in these days, and nor was it all that common for live-action kid shows, particularly the incredibly expensive Sid and Marty Krofft shows, to get a second season. So Larry Niven and David Gerrold seem to have crossed their various drafts, originally intending this to appear much earlier in the season, but they realized it would make a fine finale.
It’s a bit heady, but basically Enik discovers that there are two sets of Marshalls: one made it into the Land and the other is trapped in a time loop on Earth. Nobody can leave through a time doorway – another sign that this was intended for earlier in the season, because Beau Jackson did just that in the previous episode – until it is resolved. Enik can manipulate a doorway to bring the alternate Marshalls into the Land, but will not; such interference is against his people’s code. So Rick Marshall does it, bringing the other family in so that his family can leave. There’s a little more to it than that, but there’s the gist.
So Marshall Family # 1 experienced the Land up through the events of “Circle” (wherever it actually fits in the show’s chronology, probably around episode 12) and went home. Marshall Family # 2 experienced the same events, skipped “Circle,” and continued onward, probably popping from Beau Jackson and “Hurricane” to the next episode that we’ll watch. Confused yet?
Don’t worry; kids can understand it. Daniel loved this episode and bravely insisted that he wasn’t scared. That’s actually not completely true, because he whimpered through all the Sleestak bits, and when one popped up out of nowhere to grab Spencer Milligan from behind, he leapt about three feet with a shout.
Sadly, this was the end of Gerrold and Niven’s tenure on Land of the Lost, and with them went most of the pipeline to all the Star Trek writers. But even without Gerrold’s guiding hand, season two still has a heck of a lot of great material in it, including what’s by far my favorite episode of the series. Gerrold went on to focus on writing some very good novels, but has occasionally dabbled in television. In 1989, I wrote him a fan letter and he kindly replied, noting that he and some associates had almost got to make a Return to the Land of the Lost series a few years previously. It’s a shame that program, whatever they planned, never happened. I am absolutely certain that it would have been superior to season three of this show, and hundreds of miles better than that diseased 1990s remake.