10 years ago, ITV dropped one of its most gripping crime dramas. Marcella follows the journey of troubled detective sergeant Marcella Backland (played by Anna Friel), who has returned to work after taking a career break. Things take a turn when the team is tasked with investigating a decade-old serial killer after more bodies of victims turn up in a similar way to the case Marcella investigated when she was still on the force. However, in an unexpected twist, the viewer is left wondering