How TV shows get renewed or cancelled: the metrics and money behind the decision

A TV show gets renewed when the people who paid for it believe it will keep earning more than it costs. It gets cancelled when that belief fades. That is the whole equation, and everything else — the ratings story, the fan campaign, the cryptic cast statement — is a detail inside it. What makes the process confusing is that the numbers are private and the yardsticks keep changing. A broadcast network, a cable channel and a streaming service measure success in different ways, so two shows with seemingly similar audiences can meet very different fates. Understanding the measurement each buyer uses explains most renewal decisions long before an announcement is made. This connects to our earlier piece, How a long-read celebrity profile gets made, from first call to cover. What numbers actually decide a show's fate? For a broadcast network, the traditional measures are how many people watch live, how many watch within a few days, and — crucially — how old those viewers are.

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