Wikipedia

1989–90 United States network television schedule (late night)

These are the late night schedules for the four United States broadcast networks that offer programming during this time period, from September 1989 to August 1990. All times are Eastern or Pacific. Affiliates will fill non-network schedule with local, syndicated, or paid programming. Affiliates also have the option to preempt or delay network programming at their discretion.

Legend

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  •   Light blue indicates Local programming.
  •   Gray indicates encore programming.
  •   Yellow indicates late night talk or variety shows.
  •   Gold indicates network news programming.

Schedule

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Monday-Friday

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Network 11:00 pm 11:30 pm 12:00 am 12:30 am 1:00 am 1:30/1:35 am 2:00 am 2:30 am 3:00 am 3:30 am 4:00 am 4:30 am 5:00 am 5:30 am
ABC Fall Local Programming Nightline Local Programming
Summer Into the Night Starring Rick Dees Local Programming
CBS Fall Local Programming The Pat Sajak Show Local Programming CBS News Nightwatch
Spring Wiseguy CBS Late Night Local Programming
NBC Local Programming The Tonight Show Starring Johnny Carson Late Night with David Letterman Later With Bob Costas (Mon-Thu, 1:35)
Friday Night Videos (Fri, 1:30-2:30) 		Local Programming

The Pat Sajak Show was reduced to 60 minutes on October 30, 1989.

Saturday

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Network 11:00 pm 11:30 pm 12:00 am 12:30 am 1:00 am 1:30 am 2:00 am 2:30 am 3:00 am 3:30 am 4:00 am 4:30 am 5:00 am 5:30 am
NBC Local Programming Saturday Night Live Local Programming
FOX Comic Strip Live Local Programming

Sunday

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Network 11:00 pm 11:30 pm 12:00 am 12:30 am 1:00 am 1:30 am 2:00 am 2:30 am 3:00 am 3:30 am 4:00 am 4:30 am 5:00 am 5:30 am
NBC Local Programming The George Michael Sports Machine Local Programming

By network

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ABC

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CBS

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NBC

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Fox

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