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only two years for longest-running prime-time series
Hallmark Hall of Fame "is the longest-running prime-time series in the history of television; it began airing in 1951 and is still currently in production" (according to Wikipedia), but only 2 years of episodes are listed on IMDb.





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gromit82
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2 years ago
Roots: Hallmark Hall of Fame is very long-running but doubtful as being a "series" for most of that time. Only from 1951 to 1955 did it air on a regular weekly schedule; after that only two to six films were produced per year. As the show did not air on a regular schedule nor have continuing characters or cast, IMDb lists most of the Hallmark Hall of Fame movies as separate TV movies. (See https://www.imdb.com/search/title/?companies=co0078555 for many of them.)
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