I think the thing that hurts the episode more than anything is how wooden Hunter and Barrett were. I love Shatner but the series with Hunter as the star is an interesting "what if?"
In retrospect it was way too serious/humourless for me.
And I know people might not understand what I'm saying but is has too many white handsome all American boys for me. The crew is too good-looking, too gun-ho. Sort of like the crew in 'Forbidden Planet'. But they had some slackoes in the lower ranks so that made Forbidden Planet acceptable.
I still like the Cage but glad they changed the cast