The Jetty Ending, Explained: Who Was the Killer?

Recently released by the BBC, The Jetty is a British police and crime drama that follows Detective Ember Manning as she uncovers the link between a boathouse catching fire and a missing persons case from 17 years ago. Known for her role as Clara Oswald in Doctor Who, Jenna Coleman as Ember brings discord to her small Lancashire Town when the investigation becomes increasingly pointed towards some controversial people.