50 Longest Running Primetime TV Shows

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Source: Courtesy of CBS

45. What’s My Line? (1950-1967)
> Series run: 18 years
> Network: CBS
> Genre: Game show
> IMDb user rating: 8.7/10

Source: NBCUniversal Television Distribution

44. Law & Order: Special Victims Unit (1999-present)
> Series run: 18 years
> Network: NBC
> Genre: Crime drama
> IMDb user rating: 8.1/10

Source: Courtesy of CBS Television

43. Lassie (1954-1973)
> Series run: 19 years
> Network: CBS
> Genre: Children/family
> IMDb user rating: 6.6/10

Source: Courtesy of Paramount Television

42. SpongeBob SquarePants (1999-Present)
> Series run: 19 years
> Network: Nickelodeon
> Genre: Animated sitcom/children
> IMDb user rating: 8.1/10

Source: Courtesy of Shout! Factory

41. The Red Skelton Show (1951-1971)
> Series run: 19 years
> Network: NBC, CBS
> Genre: Variety show
> IMDb user rating: 8.3/10