I believe you are referring to the episode "The Changeling" Where the probe "Nomad" erases Uhura's memory because she is "a mass of conflicting impulses".
Kirok was the name Captain Kirk adopted while suffering from amnesia in Star Trek The Original Series episode "The Paradise Syndrome".
The best 'original' series episode to show someone who has no idea about "Star Trek" is the episode entitled "The Trouble with Tribbles". It captures the spirt of the original series perfectly.
Original series episode 3
The original Twilight Zone did not have an episode where there were segments of colour .
episode 191 in original series
Original series 152-157
In the Original Series Gohan kills him in Episode 176 In the Remastered Series Gohan Kills him in episode 191
Original series 192
Original series 172-173
The star date given in the first regular series episode of Star Trek is 1312.4
Original series 93-96.
Original series 151