One of the few shows to actually reverse jump the shark. The first series is definitely the worst, but still has it's funny moments. But when Ben Elton joined the team and the character or Blackadder became witty and a real bastard, the show becomes brilliant.
Rowan Atkinson is at his all time best here, none of that bumbling idiot he's been reduced to ever since Mr Bean. The jokes and stories are genius, making fun of the times in which each series is set.
Listen, if you ever get the opportunity, watch the show, you'll love it. If you've already seen it, watch it again. But then again, I don't need to tell you that.