Continuity mistake: When Gran and Saffy are are talking to the New Best Friend at The End of the show the first thing that happens is that a wine glass next to New Best Friend slides along the table (you see this happen on screen)then it changes from wine to water back to wine.
Continuity mistake: In the 1991 flashback, Jamie is already engaged to Paul and is shown with long hair. However, in the 'Cold Feet' episode, Jamie is shown with short hair. Since the 'Cold Feet' episode was set in February of '91 and the flashback from this episode was set in late March or April of '91, these two episodes don't match up.
Continuity mistake: In the episode where Fester invents a fabric: When Fester lies down on the parking lot, his head is first pointing upwards, towards a car, then in the next shot he has turned 90 degrees and his head is pointing towards Norman's legs.
Continuity mistake: Mark writes Mr. Cooper on the blackboard. The shot changes, the position of the letters have changed. Later on in the scene his name is now underlined.
Continuity mistake: Everyone drops to the ground and ducks when they believe that they heard gunshots. The microwave beeps and Tommy says it's just his popcorn. When he takes the bag out it is white, but immediately afterward it is red. (00:13:20)