Other mistake: The main characters are always clean shaven, the same clothing is worn and their hair never grows from episode to episode.
Planet of the Apes (1974)
1 mistake in show generally - chronological order
Starring: Roddy McDowall, James Naughton, Mark Lenard, Ron Harper
Urko: These humans are dangerous, don't you understand that? They think that they're as good as we are.
Trivia: In the early 1990's, Roddy McDowall (Galen) was asked what happened to Burke and Virdon after the series ended, as it was abruptly canceled. He replied they found a rocket ship ship, took off, and went back to their own Earth and time.