Visible crew/equipment: During the general's speech about how Blackadder is the person to organise a concert party, look at the entrance to the trench. In one shot you can see a crew member moving a giant cloth. You see mostly the movement, but you can catch a glimpse of the crew member's face. (00:06:50)
Blackadder (1986)
1 mistake in Plan C: Major Star - chronological order
Blackadder: We are reprieved. It is a triumph for stupidity over common sense.
Baldrick: Thank you very much.
Blackadder: As a special reward, Baldrick, take a short holiday. [Pauses for a second.] Did you enjoy it?
Trivia: Stephen Fry, who played Lord Wellington, ad-libbed most of his lines.
Question: Does anyone know what the actors are saying during their 'anti-Macbeth' chant?
Answer: According to the IMDB.com's quote page for Blackadder The Third, it's "Aahhhhh. Hot potato, orchestra stalls, Puck will make amends. Owwwwww."