50 Longest Running Primetime TV Shows

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Source: Courtesy of Disney–ABC Television Group

35. The Original Amateur Hour (1948-1970)
> Series run: 21 years
> Network: DuMont, NBC, ABC, CBS
> Genre: Reality
> IMDb user rating: 7.6/10

Source: Courtesy of PBS

34. Antiques Roadshow (1997-present)
> Series run: 21 years
> Network: PBS
> Genre: Reality
> IMDb user rating: 7.4/10

Source: Courtesy of PBS

33. The New Yankee Workshop (1988-2009)
> Series run: 22 years
> Network: PBS
> Genre: Woodworking
> IMDb user rating: 9.1/10

Source: Courtesy of Turner Classic Movies

32. Private Screenings (1996-present)
> Series run: 22 years
> Network: TCM
> Genre: Documentary
> IMDb user rating: 8.8/10

Source: Courtesy of CBS

31. Late Show with David Letterman (1993-2015)
> Series run: 22 years
> Network: CBS
> Genre: Talk/variety
> IMDb user rating: 6.9/10