Dive into the shocking ending of Netflix's No. 1 crime series, "Adolescence." Why did Jamie kill Katie, and what happened to him and his family in Episode 4?

The limited series unfolds in real time over four hour-long episodes, with a single camera shot chronicling Jamie's arrest, police investigating at his school, his tense interview with a court-appointed psychologist, and his family coping with the fallout.

Note: This story contains spoilers from "Adolescence" on Netflix. There's a lot about "Adolescence," Netflix's new limited series, that is designed to shock viewers. But perhaps the most surprising detail of the whole show is its complete absence of a big twist.