The final scene features Eddy weeping in his son’s bed, surrounded by Jamie’s belongings and toy teddy bear. He gives the bear a small kiss, and tucks it into bed — something he probably won’t be able to do with his own son ever again.

Did Jamie actually kill Katie in Netflix's Adolescence? This is not an open question, and it shouldn't be considered one.

As far as episodes go, the ending of the fourth episode is harrowing, with Eddie breaking down and blaming himself for his son's actions. The show emphasizes how the murderer's family's lives are forever changed.