When was that, around 1988? I saw The Cage on tv, the version that was about half & half B/W and color, with Malachi Throne's unaltered Talosian voice in the B/W scenes. Roddenberry introduced it as I recall, explaining that they had found an original print and pieced it together with the only color scenes available from The Menagerie.
Yep. The b/w reels were from the "workprint", which GR used to show at university gatherings. After the b&w/color compile was put out on home video and then TV (within the "Saga" documentary") and got some new publicity, the original editor from Desilu realized he still had the missing color offcuts in his attic, and an all-color version was finally assembled.