What has been on during the 11:30 and 12:30 timeslots for the big 3 networks over the years?
Here’s a starting point.
Well I guess I should say more about it. That’s the TV schedule for WTMJ-TV in Milwaukee from 1947-1997 They didn’t start shows after 11:30 pm till Broadway Open House in 1950.
It looks like Tonight from NBC was their first network show they showed that late.