Blackadder (1986)

Season 2 generally

Continuity mistake: During the introduction, the snake tries to get away from someone who is supposedly Blackadder. He gets the snake. It's head is above a black tile. There is then a close-up of the snake, Blackadder wags his finger at it. It is now above a white tile.

Beer - S2-E5

Continuity mistake: Edmund throws his drink into the cupboard under the stairs, leaving a stain on the floor. Yet when he directs Queenie there a few seconds later, the floor is unstained.

PeterNZ

Chains - S2-E6

Continuity mistake: At the very end of the episode, when it shows you all the dead bodies, you can see Queenie to the right for a few seconds. The dagger she is holding is pointing upwards. Then there is a close-up of Queenie, who then talks back to you in Prince Ludwig's voice, and the dagger she is holding is now pointing downwards.

Beer - S2-E5

Continuity mistake: There is a knock on the front door, and Blackadder tells Baldrick to 'get the door'. Baldrick returns with it, but the front door on the set, still in place, is still visible in the background of the shot.