Corrected entry: Nursey says that ointment is what's needed when your head's been cut off and that's what she used with Queenie's "sister Mary when they done her." Mary, Queen of Scots, was the only close relative of Elizabeth that was beheaded and called Mary but she was a cousin. Elizabeth's half-sister Mary was not beheaded, she was queen (as Mary I) before Elizabeth and died of influenza and cancer. Also, Mary was beheaded in 1587 when Elizabeth was 54, Miranda Richardson hardly seems 54 and in "Potato," Sir Walter Raleigh has just returned from America and mentions that he left Plymouth in spring of 1552 so Mary is over thirty years away from her beheading.
Corrected entry: One of my favorite lines is when Blackadder refers to himself as "The new minister of religious genocide". However, the word "genocide" didn't appear until around the mid-1940's when Raphael Lemkin invented it specifically to describe the events witnessed in the Holocaust.