The Cage SEASON 1, EPISODE 00
I lied, and watched the original pilot first. No Shatner.
This one had Jeffrey Hunter as Captain Pike, and a few other personnel changes. Majel Barret, who became the semi-regular Nurse Chapel, was here a brunette and Number 2. Mr Spock was there, but the makeup and mannerisms were different - he smiles (see picture)! The uniforms were also different - no red shirts (and indeed, much of the footage was black and white).
Enjoyable, but Hunter is way too earnest as Pike - it's a massive piece of luck he didn't want to engage after this, and Shatner arrived, with his dynamic and energy.
let's say 7/10, with a whole 2 of those because it's the original pilot