Once again with a tip of the cap to Blog Wilkins for hunting this stuff down.
Looking over the TV listings for October 26, 1968, Bay Area version, I see, besides the channels I spoke of earlier and some others that didn't come in at our house, two other UHF channels, 20 and 44. So we had a bit more TV than my last post may have suggested. The rest of this post is pure nostalgia and thus, pure crap, but here goes.
When Channel 40 began broadcasting with that Boston Blackie movie, ABC was showing the Notre Dame-Michigan State football game (the Irish were ranked 5th in the country, but State won, 21-17). Later, ABC's Wide World of Sports had stock-car racing and table tennis. In those days, you could have a popular sports show with events that had occurred days or even months earlier ... hardcore fans might know the results, but the casual viewer would tune in to the National 500 Stock-Car Championship, taped eight days earlier, without knowing who won (in this case, Charlie Glotzbach).
Some of the shows are tagged "COLOR" ... not every show was in color in those days, so those tags were important.
That afternoon, Channel 3 showed the Japanese sci-fi movie Attack from Space, which I watched many times as a kid. The plot is described as "Spies from the planet Sapphire force a Japanese scientist to aid them in their plans for invading earth." This was one of the infamous "Starman" movies, straight-to-TV American edits of Japanese films.
Channel 11 from San Jose showed the immortal TV series Spotlight on Speed. Immortal at our house, at least ... the show was created by my uncle, and starred my aunt (my dad's sister) as "Miss Speedway."
Channel 40 ran episodes of an odd series called Silents Please. This series would take silent movies and edit them to fit a 30-minute time slot. This wasn't easy ... the first movie on the Ch.40 run was Old San Francisco, which in its original form ran 88 minutes.
Finally, it's worth noting, as Patrick Ellis did in an earlier comment, that most stations went off the air during the early morning hours (although UHF channels soon came up with the all-night movie format for insomniacs). Patrick mentioned the national anthem being played before signoff ... there was also an odd show, I think it ran fifteen minutes, that was shown before the national anthem on some channel. It was called Ebbtide, and it consisted of poetry read on a voiceover while the picture showed waves crashing on rocks with a lovely lady in a flesh-colored bathing suit posing for the camera. The lady's name was "Lorelei" ... she was my aunt, the same one who played "Miss Speedway."