How exactly were the Alfred Hitchcock Presents/Hour episodes broadcast originally in the USA?

How exactly were the Alfred Hitchcock Presents/Hour episodes broadcast originally in the USA? - Paper composition of man with megaphone announcing news for attracting attention and interest against blue background

I know for sure that they were shot on film, but that's where my facts stop. I'm wondering how they technically ended up in the television sets of the watchers in their original runs.

I'm talking about these related shows:

  • Alfred Hitchcock Presents (1955–1962)
  • The Alfred Hitchcock Hour (1962–1965)

At least in the latter series, at the half-way point, Hitchcock shows up saying that it's now time for a "station break". Does that mean that some central "server" had the single physical film roll which was transmitted to thousands of television stations all over the USA, live, and if they did not stop their "station break" content/ads in time, they would cut right into the middle of the second half of the show, with no way to "rewind" it for their local viewers?

Or, alternatively, did the creators of this show make thousands of physical copies of their original film roll and physically send these to each local TV station, which then had their own copy to broadcast, and thus were able to have any length of a "station break" (and arbitrary ads put in), and could just resume their own local film roll when they were ready?

Seems like the latter part would be very expensive? And if so, what happened to all those film rolls afterwards?






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When did The Alfred Hitchcock Hour Air?

CBSNBC

What network was Alfred Hitchcock Presents on?

Alfred Hitchcock Presents: The 10 Best Episodes Hitchcock Directed, Ranked
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  • What is the best Alfred Hitchcock Hour episode?

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    THE ALFRED HITCHCOCK HOUR: \




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