It was also a Thursday night in 1966!
Oh-ho!
Also, was reading today (as part of that history) how NBC killed the show -- they were set to cancel it in season two, and then a letter writing campaign saved the show. So here's this massive outpouring that gets the show renewed and...what do they do? They cut the per-episode budget by a third, they move it to the Friday death slot, and they take it off a quarter of their affiliates so half the country couldn't even watch the 3rd season even if they wanted to.
Fuck you consumers! We were going to cancel it and we'll get our way by hook or by crook!