Hence, the denizens of Talos IV are Star Trek's original villains who aren't really villains. Star Trek isn't defined by a simplistic 'good vs. evil' paradigm. While the Starfleet Officers of Star ...

Star Trek: The Original Series, The Pilot, "The Cage." Although one could argue that Pike's last appearance was in the TOS episode "The Menagerie" which is when he returned to Talos IV permanently ...

As already discussed, Star Trek had a genius for reusing materials ... Spock wants to take Pike back to the forbidden planet of Talos IV, resulting in a Starfleet court martial.