How many episodes of "Gunsmoke" (CBS, 1955-75) were there?

There were six hundred and thirty-five episodes of “Gunsmoke” (CBS, 1955-75).

409 of them in black and white, 226 in color.

The show was the longest-running weekly prime-time series with continuing characters.

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How many episodes of “Gunsmoke” (CBS, 1955-75) were there?