The action-adventure ones would obviously translate more easily to TOS. Three come immediately to mind for me Lonely Among Us
, Where Silence Has Lease
and The Ensigns of Command
Of course, Lonely...
already has some TOS elements with the battling delegates being ferried to a diplomatic conference.
As an aside, I always thought the Voyager episode The Thaw
would've made a great TOS episode.
I wonder if virtual reality would've been beyond the comprehension of 1960's audeinces. Also given the importance the Doctor played in the episode, I wonder how that would work.
is another that would've worked well. That has Kirk written all over it.