The Flintstones' became primetime TV's first animated series in 1960.

The Flintstones, The Flintstones

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ABC News - ON THIS DAY: In 1960, “The Flintstones,” network television's first animated prime-time series, debuted on ABC.

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The Flintstones' became primetime TV's first animated series in 1960.

The Flintstones (TV series), The Flintstones Wiki