Paranoid is a British crime drama, which began broadcasting on ITV on 22 September 2016, and streaming internationally on Netflix in 2016.

The eight-part series focuses on a group of UK detectives working for the fictional Woodmere police force attempting to solve the murder of a local doctor who is stabbed at a children's playground.

They initially suspect the murderer is a local mental patient, Jacob Appley, who is under the care of psychiatrist Dr. Chris Crowley.

[4] Meanwhile, an unidentified man dubbed the "Ghost Detective", is sending the team information and clues to evidence that could identify Angela's killer.

A suspect in the murders is identified, but when he evades capture and flees back to Germany, Niles arranges for Bobby to travel to Düsseldorf to assist with the German investigation.