After the "Working-Class Playwright" sketch ends, Michael Palin taps on the ceiling with a broom and it wobbles, showing that it's just a studio set.
During the "Flying Sheep" sketch, two French experts on "ovine aviation" share one mustache between them, which is worn by whichever expert happens to be giving the lecture at the time. At one point, Michael Palin takes off the mustache and puts it back on John Cleese. In order to hide his laughter, he turns away from the camera immediately afterward.
Monsignor Edward Gay (the Catholic wrestler Bishop) wears scarlet insignia, as if he were a Cardinal: a Monsignor should wear purple insignia.