Nobody is mentioning Project UFO. I saw it as a kid.

https://youtube.com/playlist?list=PLwoa322Klork1bKONV4s8kyFukPJi52jJ

Of course the intro I remember looked more like: https://youtu.be/yVVADz0Afss?is=oioZcaQj_SkelcaB

I also thought it was called Project Bluebook

Oh and this really bad Christmas based alien show that nobody bit me remembers: https://www.imdb.com/title/tt0182015/