The Luxury of Conscience - S2-E8
Character mistake: The Speaker calls on Lord George Bentinck as "the Honourable Member for Lincoln." He was actually the Member for King's Lynn.
Character mistake: At Houdini's performance for the Kaiser, a German officer with the rank of Lieutenant Colonel (Oberstleutnant) is asked to assist. Houdini at first correctly addresses him as Lieutenant Colonel, but then incorrectly refers to him as Lieutenant several times after that.