From NetFlix:

After suffering head trauma from a shooting, moody, job-obsessed Detective Inspector Dave Creegan of the organized and serial crime unit heads off some of England’s most deviant and deadly offenders by creeping inside the criminal psyche.

Robson Green plays the DI Dave Creegan in this British detective TV series. His character is single-minded, isolated, and socially awkward. As is often the case in British detective shows, the crimes are usually violent and involve some ugly scenes. Indeed each episode develops side by side both Creegan’s personality difficulties as well as the crime du jour. You will not relax watching these plots but you will probably not be able to stop watching despite the suspense.

After he made this series, Robson Green then starred in Wire In The Blood in which he portrays the exact same personality, the only difference being that in this later series he ia cast as a free-lance psychologist specializing in the criminal mind.

Both “Touching Evil” and “Wire in the Blood” provide tense, suspenseful viewing that (providing your nerves hold up) you don’t want to miss.