Continuity mistake: When the Nazi commander throws the crocodile at Ace, it changes size between shots. As he throws it, it is small and easy to throw, yet in the next shot it reveals it is taller than Ace. (00:01:00)
Plot hole: In the last series, a point was made that the time drive is not a teleporter, so can only send them backward and forward in time in the one location (Deep Space). So in this episode, how can they now travel to Earth with the same device?
Continuity mistake: Lister screws in Kryten's replacement head (the one without the 'guilt chip') in exactly the SAME direction that he unscrewed the original head (to be exact - clockwise) (00:09:50)
Continuity mistake: When the tent disappears, Lister's locks are over his right shoulder. In the next shot they are over both shoulders. (00:10:00)
Continuity mistake: During Ace Rimmer's funeral, the blow up doll is not visible earlier in the scene next to the Cat, but then appears from nowhere. (00:24:50 - 00:25:40)
Continuity mistake: When Kochanski puts the cat in the disintegrator, it changes the way it's facing between shots and again when she takes it out. (00:11:19)
Visible crew/equipment: When Lister does the log at The Beginning of the episode, a boom mic shadow can be seen on his face throughout the scene. (00:00:40)
Continuity mistake: Able's head bounces off the simulant and lands behind him, yet when Lister sends the gelf and simulant back to their ship, the head is next to him on the floor. (00:20:10)
Continuity mistake: When the ducts are being backwashed, Lister's dreadlocks are on his right shoulder. But when the shot changes and he says "I hate this. I really hate this.", his locks are on his left shoulder. Then the shot changes again and they're back on his right shoulder. (00:23:53)
Visible crew/equipment: When Rimmer says that Kennedy was a fine man, a boom mic can be seen at the top of the screen. (00:20:22 - 00:21:17)
Continuity mistake: When the simulant drinks his drink, he lifts the cup up to drink, yet in the next shot he lifts the cup up again, repeating the same action twice between shots. (00:13:50)
Continuity mistake: When Lister claims his 'prize' the king's hands are on his lap. In the next shot his right hand is clutching the helmet. (00:09:05)
Continuity mistake: When Lister unscrews Kryten's head, the plastic bag on the table moves between shots. (00:11:30)
Answer: It's Queen Victoria, someone any Englishman would recognize, and needed no introduction.