Black Mirror: Every Major Plot Twist Ranked From Worst To Best
12. Shazia's Son Was Blind... But The Guinea Pig Remembers - Crocodile
In season 4's Crocodile - or, as I like to call it, Black Mirror Knows What You Did Last Summer - Mia (Andrea Riseborough) will do anything to keep the dark secrets of her past in the closet.
Due to an insurance company that uses memory-viewing technology prying into her business, Mia ends up on a killing spree. In one of the show's darkest moments, Mia is forced to kill a toddler, thinking the boy's memories could be used against her.
The tragedy is that it's later revealed that the boy was blind, therefore he did not see her. However, Mia will still be found out as someone else witnessed the murder: the boy's pet guinea pig.