Continuity mistake: When Mike tells Neil to sit down, he turns his head to face him. When the shot cuts, he is suddenly looking down at his book. (00:04:53)

Continuity mistake: When Mike approaches Rick while he is reading the Cosmopolitan magazine, Rick stands up and drops the magazine on the table. The shot then cuts to Vyvyan briefly, but when it cuts back to Rick and Mike, the magazine has disappeared from the table. (00:09:35)

Continuity mistake: To stop Neil from sneezing, Vyvyan puts a pillowcase over his head. The pillowcase changes position two shots later, just before Neil sneezes again. (00:05:20)
Continuity mistake: When Rick sees Neil climbing in through the window, he starts screaming and raises his right hand. When the shot cuts, his right hand is lowered. (00:33:21)

Continuity mistake: When Vyvyan crashes into the lamp post, he has his right hand placed on top of the steering wheel. In the next shot, he has his right hand positioned at the top right corner of the steering wheel. (00:30:55)
Continuity mistake: On the bus, when Vyvyan suggests that they pick up some girls who can do their cooking and cleaning, Neil can be seen in the background looking at Vyvyan. When the shot cuts back to the other three, Neil is looking at Rick. (00:32:55)






Answer: Madness also appeared in the episode "Sick", where they performed their song "Our House", which was their biggest (and only major) hit in the US.
zendaddy621