The genre of science fiction sitcom is a relatively new one having started significant growth only during the last few decades of the twentieth century. Most of the comic science fiction in this genre is considered lightweight compared to the mainstream.
It's About Time[?] -- an early example of the genre, involving astronauts who travel back in time to meet a tribe of cavemen
The Jetsons -- a Hanna-Barbera cartoon about George, Jane, Judy, and Elroy Jetson, family of the future
Kinvig[?] -- a UFO fanatic becomes convinced that the woman who continually rejects him is an alien queen; written by Nigel Kneale[?] of Quatermass[?] fame, but not very funny
Luna[?] -- A synthetically produced family in a futuristic urban habitat
Metal Mickey[?] -- kids' show in which a wise-cracking robot lives with a family
... Polo, (1254-1323), travelled to China in the 13th century.
John Wesley Powell, (1834-1902), explorer, environmentalist
Nathaniel Pryor[?], (c 1785-1850), US ...