Richard Curtis admitted in a 2004 documentary that just before recording began, producer John Lloyd came up to him with Rowan Atkinson and asked what Edmund's character was. Curtis then realised that, despite writing some funny lines, he had no idea how Rowan Atkinson was supposed to play his part.
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.
In the opening credits, Brian Blessed has a scene of King Richard IV to accompany his credit.