bpatrick said:
One from a movie, "Anger Management": Adam Sandler's character, as a kid in 1978, is shown wearing a "Dukes Of Hazzard" T-shirt. Couldn't be, since "Dukes" didn't debut until January 1979.
Another one. On
That '80s Show, which I admittedly never watched, so I cannot really comment on this, but supposedly a character on there wore a
Miami Vice-style jacket, and the show was supposedly set earlier in the '80s than before
Vice debuted.
On
Do Over (anyone besides me remember that one?), it was supposedly 1980, and the kid's alarm clock awoke him with "Wake Me Up Before You Go-Go," a clever use of the song, but its release was still four years away!
What about references to
past TV shows? The
ALF episode that referenced
Gilligan's Island was funny, but since most (if not all) of the
Gilligan's Island cast appeared on that episode, it might have been considered more of a "crossover" episode. Can you have "crossover" episodes with defunct shows? This was one of the last ever cast reunions of
Gilligan cast members, save for another appearance on the
Late Show, then still hosted by Joan Rivers.