Only series of Blackadder (as of July 2017) not to be on IMDB's top 250 highest ranked TV shows, the other three series are (as of July 2017) ranked in the top 100.
Opening tune singer:
The sound of hoof beats 'cross the glade / Good folk, lock up your son and daughter / Beware the deadly flashing blade / Unless you want to end up shorter / Black Adder, Black Adder, he rides a pitch black steed / Black Adder, Black Adder, he's very...
Blackadder is throughout the series referred to as the Duke of Edinburgh, a title that was first bestowed by King George I in 1726, on his grandson, Prince Frederick Lewis, in the Peerage of Great Britain. In the 1480s, the King of England had no jurisdiction over Scotland, where Edinburgh is. Giving Edmund an anachronistic, geographically useless title is a joke, as explained in the DVD special features.
There is a statement in the closing credits: "With additional dialogue by William Shakespeare."