During the "Mr. Attila the Hun" sketch, Terry Jones is wearing a fake mustache that he has to occasionally touch to keep from falling off. At one point in the sketch, rather than break character, he decides to incorporate it as a joke. After excusing himself to Michael Palin's character, he rips off the mustache, throws it in his policeman's hat, and puts the hat back on his head.
During the restaurant sketch, Eric Idle (playing the wife) almost breaks out in laughter when Terry Jones is wheeled in naked on a cart, garnished with lettuce and with an apple in his mouth.
During "Historical Impersonations," Michael Palin calls Julius Caesar "your favourite Roman Emperor." The title of Emperor in Rome was first used in 27 B.C., seventeen years after the assassination of the real Julius Caesar.