Other mistake: When Harold goes to kill his father, we see his dad on the seat moving each time we hear the hammer, but if you look at his head, you don't see anyone hitting him at all.
The Umbrella Academy (2019)
1 mistake in The Day That Was
Starring: Elliot Page, Tom Hopper, Emmy Raver-Lampman
Trivia: The show is based on a comic books series written by Gerard Way, who was the lead singer for the band My Chemical Romance.