Your task : see if you can improve on poor Fred Freiberger's work - pick an episode or aspect of the third season that bugs you, and suggest how it could be improved.
Assume that, unlike Fred, after you've paid the actors, you have a budget similar to that of the first season episodes at your disposal.
I'll start us off :
Spectre of the Gun
Make the Melkots the formidable telepaths Spock warns of, and film the show on a complete Western town backlot, with the Enterprise crew in Western clothing.