Little House On The Prairie: In the episode "Wave Of The Future", Mrs. Oleson decides to turn Nellie's restaurant into sort of a fast food place complete with an imitator of Colonel Sanders. Colonel Sanders wasn't born during the time frame of Little House (1870's-1880's) and fast food wouldn't become popular until the 1950's at least.
Happy Days: The Cunninghams are watching an episode of The Untouchables in a first season episode which was set in 1955. The Untouchables didn't premiere until 1959.
Laverne and Shirley: In the episode where they send the nasty letter to the boss of the department store in Los Angeles in the first season in California (1980-1981) set in 1965, the background music is the theme of Mission: Impossible which didn't premiere until 1966.
You can also see mid and late 1970's products on both Happy Days and Laverne and Shirley.
Happy Days: The Cunninghams are watching an episode of The Untouchables in a first season episode which was set in 1955. The Untouchables didn't premiere until 1959.
Laverne and Shirley: In the episode where they send the nasty letter to the boss of the department store in Los Angeles in the first season in California (1980-1981) set in 1965, the background music is the theme of Mission: Impossible which didn't premiere until 1966.
You can also see mid and late 1970's products on both Happy Days and Laverne and Shirley.