Revealing mistake: There is more mud makeup on the stuntman playing Virdon than there is on actor Ron Harper (Virdon) himself.
Planet of the Apes (1974)
1 revealing mistake in The Horse Race - chronological order
Starring: Roddy McDowall, James Naughton, Mark Lenard, Ron Harper
Other mistake: The main characters are always clean shaven, the same clothing is worn and their hair never grows from episode to episode.
Urko: These humans are dangerous, don't you understand that? They think that they're as good as we are.
Trivia: The Planet of the Apes TV series was filming in the same California hills the same time as M*A*S*H. Both shows were merely one hill away and over from the other.