Talk about nostalgia. Some fascinating trivia I ran across about that Saturday kids show:

Beauregard Jackson Beauregard Jackson (Ron Masak) of Fort Worth, Texas is a hypersonic glider pilot from 20 years in Earth's future relative to when the Marshalls became trapped in the Land of the Lost. As shown in the episode "Hurricane", he becomes briefly trapped in the Land of the Lost when Will, tinkering with the crystal matrix table in a Pylon located high on a mountain, causes a time doorway to open high above the ground. Jackson's glider was re-entering Earth's atmosphere over Ecuador, returning from a routine transit between Phoenix Port and Space Station 5. His glider's tail is suddenly severed, and the next thing he knows he is hanging from a tree by his parachute. With the help of the Marshalls, Jackson soon manages to return via the same time doorway, but the Marshalls cannot follow since Earth's end of the time doorway is 15 miles above the ground and there is only one parachute.

However, in the original script Jackson makes an offhand remark about Texas being its own country prompting a suspicious Rick to compare the currency in his wallet with Jackson's. He discovers that not only is Jackson from the future but from an alternate timeline, where Texas was not part of the United States and oil (not gold) is the standard.

William Blandings Blandings (Laurie Main) is a mysterious figure who appears to the Marshalls as a pudgy, balding man in his late 40s with a British accent. He claims to be a "repairman" for the sun (although probably just the Sun pylon) and carries an umbrella and a valise with him. Although apparently human, Blandings displays considerable—nearly clairvoyant—knowledge about both the Marshalls and the Land of the Lost and the implements he carries with him are anything but ordinary. His umbrella acts something like an air conditioner keeping himself and Uncle Jack cool during the sweltering heat of increasing solar flare activity. Much like the pylons, his valise appears extradimensional in nature and from it Blandings can produce anything he wants. He also carries an amulet which produces a forcefield which he uses to repel the Sleestak. Although a formidable being, Blandings offers hints that he was sent by and actually serves a higher power.

Malak Malak (Richard Kiel) calls himself the "God of the Cro-Magnon" and "King of the Teutons". He is an opportunistic barbarian who lies, steals, threatens, and bullies to get what he wants. How and when he came to the Land of the Lost, or where exactly in time and space he comes from, is never revealed. He diverts an underground river into the Sleestak egg caves as a means of exacting tribute from them.

Excerpt from https://en.wikipedia.org/wiki/List_of_Land_of_the_Lost_characters_and_species#Enik