1988–89 United States network television schedule (late night)

These are the late night Monday-Friday schedules on all three networks for each calendar season beginning September 1988. All times are Eastern/Pacific.

Talk/variety shows are highlighted in yellow, network news programs in gold, and local news & programs are highlighted in white background.

Fall 1988

- 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
ABC local programming ABC News Nightline Local
CBS local programming CBS Late Night local programming CBS News Nightwatch
NBC local programming The Tonight Show Starring Johnny Carson/Saturday Night Live (Sat.)/The George Michael Sports Machine (Sun., 11:30-12:00) Late Night with David Letterman Later with Bob Costas/Friday Night Videos (Fri., 1:30-2:30) local programming

Winter 1988/1989

- 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
ABC local programming ABC News Nightline Local
CBS local programming The Pat Sajak Show local programming CBS News Nightwatch
NBC local programming The Tonight Show Starring Johnny Carson/Saturday Night Live (Sat.)/The George Michael Sports Machine (Sun., 11:30-12:00) Late Night with David Letterman Later with Bob Costas/Friday Night Videos (Fri, 1:30-2:30) local programming

Spring 1989

- 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
ABC local programming ABC News Nightline Local
CBS local programming The Pat Sajak Show local programming CBS News Nightwatch
NBC local programming The Tonight Show Starring Johnny Carson/Saturday Night Live (Sat.)/The George Michael Sports Machine (Sun, 11:30-12:00) Late Night with David Letterman Later with Bob Costas/Friday Night Videos (Fri., 1:30-2:30) local programming

Summer 1989

- 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
ABC local programming ABC News Nightline Local
CBS local programming The Pat Sajak Show local programming CBS News Nightwatch
NBC local programming The Tonight Show Starring Johnny Carson/Saturday Night Live (Sat.)/The George Michael Sports Machine (Sun., 11:30-12:00) Late Night with David Letterman Later with Bob Costas/Friday Night Videos (Fri., 1:30-2:30) local programming
gollark: \ddg osmarks.tk programmer jokes
gollark: There is a *surprisingly large* population of potatOS computers in existence.
gollark: Oh, hmm, there are more potatoPCs than I assumed.
gollark: Why are there potatOS update pings so *often*?
gollark: ```<86.155.87.56> 185.39.9.34 [25/Aug/2020:16:20:01 +0000] "GET / HTTP/1.1" 301 169 "-" "Mozilla/5.0 zgrab/0.x" secure```suspicious.
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