Let the Right One In - Season 1 Episode 3 Broken Glass Anything for blood.
Overview: Upon learning that Naomi is a homicide detective, Mark covers the tracks of his most recent crime. Eleanor discovers that Isaiah is being bullied at school and seeks revenge. Naomi and her partner Ben make a massive discovery in their case, but it comes at a cost. Meanwhile, Claire is on the brink of a major breakthrough in her own right.