Trivia for Land of the Lost Fans...

• When Spencer Milligan left the show after the second season, his absence was explained by having Rick Marshall disappear after he was trying to use one of the pylons to get home.
  
  
• The producers came up with a very interesting idea to keep their viewers looking at the show during the hiatus between the first and second seasons. In the first season's final episode, the Marshalls discover that for some reason they aren't supposed to be there. Enik later informs them that due to a time disturbance that they never really arrived in the Land of the Lost and must go back in time and relive the accident that brought them there. By going back in time, they also would experience everything that happened to them up to that point in a sort of time loop.
  
  
• During the final season two new monsters were introduced, a two-headed monster named Lulu and a fire-breathing monster named Torchy. Lulu was based on the Pleisiosaur, an aquatic reptile from the Cretaceous period, while Torchy was based on the Dimetrodon, a reptile that died out before Earth's Paleozoic Era transformed into the Mesozoic Era.
  
  

• During the final season, the Marshalls and Chaka moved from their cave to a Sleestak temple. This was partially forced because of a fire that destroyed substantial portions of the studio between the show's second and third seasons.
  
  
• Wesley Eure would often perform songs at the end of several episodes with lyrics pertaining to the lesson learned in the course of the episode.
  
  
• Former Clevland Cavs and Detroit Pistons center Bill Laimbeer was a Sleestak during the show's first season

-Courtesy of IMDB