Theatre of Blood (1973)

Continuity mistake: The hot knives that are set up in the King Lear scene towards the end of the film are sometimes smoking and sometimes not depending on the shot.

David Mercier

Plot hole: Edward Lionheart severs the head of theater critic Horace Sprout while Sprout and his wife are asleep. (Lionheart gave them both a knockout injection). Sprout's wife (and his maid)discover the severed head in the morning, and both scream and faint. But in the next scene, critic Perry Devlin retrieves his morning newspaper and then reaches for his bottle of milk, only to find Sprout's head perched on the milk bottle. How did the head get from Sprout's house to Devlin's place?

Revealing mistake: When Jack Hawkins punches through the door it is very apparent that it's made of very thin wood to make it much easier to hit through.

David Mercier

Trivia: One of the movie critics that Edward Lionhart kills in the movie is Miss Chloe Moon, played by Coral Browne. In real life, Vincent Price and Coral Browne fell madly in love while making this movie, and they married shortly afterward, and remained married until her death in 1991.

Peregrine Devlin: You begin to resent an actor if you always have to give him bad notices.

Inspector Boot: Who hates you enough to kill two of your circle?
Peregrine Devlin: Critics are likely to make enemies, inspector. You can call it an occupational hazard.

Inspector Boot: Look, Devlin, when two people have the same motive to murder and one of them is still alive, who would you arrest?