Continuity mistake: When the two children visit the Ghostbusters the little girl is wearing a pink pajama top and pink bottoms. In the next scene the pajama bottoms change color and are now orange.
Continuity mistake: After Brian finds the note Alf left, we see William put the note under the microscope to inspect the tear drops. When William says "I'm going to go find him," he stands up and we see him leave the note on the microscope. When the camera cuts to William walking through the door, he all of a sudden has the note in his hand that was left on the microscope. (00:12:55 - 00:13:35)
Continuity mistake: In Back and Forth, the 'modern' Edmund makes off with the helmet we saw Georgius put on the wall. But in the next shot of the Roman Blackadder and Georgius, the helmet is still where Georgius left it.
Continuity mistake: When Sledge sinks the 7-ball at the pool table, there are 2 black 8's and 2 red 3's left. After the cut suddenly there is only one yellow-striped 9 on the table. (00:20:55)
Continuity mistake: In series two, episode two, Control falls from the window of his sixth-floor office. However, in series one, episode six, Control welcomed Tony "to the seventh floor".
Charliegate - S1-E3
Continuity mistake: Dennis writes "who cares" on the chalkboard. The placement of the letters changes, most noticeably the S.
There She Is - S4-E3
Continuity mistake: In season one, episode two, "The Beauty Contest," Julia Sugarbaker states the following about her sister Suzanne becoming Miss Georgia World, 1976: "when she emerged from the isolation booth to answer the question, "What would you do to prevent war?" she spoke so eloquently of patriotism, battlefields and diamond tiaras, grown men wept." However, in this episode, Suzanne recalls her answer to the final question, "I said I wanted my own TV show." Further, the name of the pageant changes from Miss Georgia World to Miss Georgia U.S., and the year changed to 1975.