While Sam is delivering the Invisible Man joke, his hair is wet and sweaty. When he turns around to talk to Al afterwards, his hair is perfectly dry and styled.
The position of the container of coffee creamer, although untouched, changes between shots.
Sam meets Chubby Checker in the radio station lobby and soon after plays his demo record of "The Twist". However, the song was released in the summer of 1960 and reached #1 in September. This episode takes place in September of 1959.
The "Peoria Dispatch" did not exist and must be a fictional newspaper. The only major newspaper printed in Peoria, IL during the time of the episode would have been the "Peoria Journal Star", named in 1954 following the merger of the Peoria Journal-Transcript and the Peoria Star.
The "Peoria Dispatch" is a fictional newspaper. The only major newspaper printed in Peoria, IL during the time of the episode would have been the "Peoria Journal Star", named in 1954 following the merger of the Peoria Journal-Transcript and the Peoria Star.
At one point, Sam's reflection instead of that of Chick Howell can be seen in the glass behind him in the DJ booth.
When Fred is smashing the door with the axe it cuts to the crowd yelling and he is seen wearing his hat and jacket.
Mannequins are used as stand ins for people in the street scene visible through the front window of the studio. After a brick is thrown through the window, the mannequins are rearranged as if reacting to the commotion.
In several shots a second full studio can be seen through the window, which would allow the station to continue operating after the console Sam is using is damaged.
Sam Beckett gives Chubby Checker the idea for the Twist in 1959, but a few moments before, during a street scene, one of the girls is dancing the Twist to the Radio WOF record.
As Sam is showing a bunch of 45s to Al, one can make out a particular sleeve for A&M Records, which wouldn't be formed for at least three years past this supposed date. And the sleeve pictured was from the 1970s anyway.