From my earliest memories in the NYC market, Channel 2, WCBS-TV would run all night. Looking at old TV Guides, I see this wasn't always the case. Most network affiliated stations by the early 50s would run a late movie after the news while NBC affiliates would run the Tonight Show which started with Steve Allen hosting in 1954.
At first WCBS-TV ran one movie, "The Late Show," then a second movie, "The Late Late Show" by the late 50s, going off the air around 3 or 3:30am. It wasn't till sometime in the 60s that they'd run a third movie, essentially becoming a round-the-clock TV station. However, whoever did the scheduling never bothered to make sure the last movie ended around the beginning of the broadcast day. Some nights there'd be up to an hour of the Test Pattern before the Star Spangled Banner aired, followed by the morning Sermonette and then CBS's Sunrise Semester, a college lecture.
I wonder if they thought nobody would be up at 5am, so it didn't matter if the movies timed out correctly? Or why they didn't think to run an old half-hour sitcom or other program such as Mike Wallace's "Biography" to fill in the gap? Or did everyone just figure that every station should run its test pattern for a while so the boys in engineering had a chance to make adjustments before the start of a new day?
Of course, today stations run 24/7, never running the SSB or a test pattern. But they have live news programming beginning at 4:30am in many markets and at 5am in smaller markets. So much for the theory that nobody's watching at that early hour.
One last memory. Since we just finished with the holidays, I remember when WCBS-TV every Christmas Eve ran three movies overnight into Christmas morning... the three versions of A Christmas Carol. I believe CBS Network ran services from a well-know Protestant Church someplace in the U.S. which they still do (in contrast with NBC's tradition to this day to show Midnight Mass from the Vatican). Then at 12:30 or 1am, when the network was finished, WCBS-TV would run each version of A Christmas Carol, starting with the latest, which I suppose was the Alastair Sim version from 1951, which my dad always said was his favorite. I believe there was one from the 40s and one from the 30s.
Gregg
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