
Unforgotten(2015)
London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons, murder and long-hidden secrets.



Paul McGann
Richard Reeves

Douglas Henshall
D.I. John Tolin

Matt Ryan
Dave Brown

Phil Davis
Brian Edwards

Sylvia Syms
Joyce Thompson

Dean Lennox Kelly
Danny Rampton

Lucy Griffiths
Jane Tarrant

Jocelyn Jee Esien
Cindie Smith

Claire Rushbrook
Karen Donnelly

David Bamber
Sidney Norris
Collision is a drama, crime, mystery series that first aired in 2009 exploring themes of detective, investigation, police, murder, car crash, road accident. Created by Michael A. Walker, it stars Paul McGann, Douglas Henshall, Matt Ryan. The story of a major road accident and a group of people who have never met, but who all share one single defining moment that will change their lives.
Discover shows like Collision — ranked by similarity and community votes
We found 15 shows similar to Collision
If you enjoyed Collision, you'll love these handpicked recommendations. Each title below shares similar themes, tone, and storytelling style. Our algorithm analyzes genres, keywords, creator filmography, and cast connections to find the closest matches. Whether you're looking for the same emotional depth, narrative structure, or visual style, these picks are curated to deliver the best viewing experience for fans of Collision.

London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons, murder and long-hidden secrets.

A dark psychological crime drama starring Idris Elba as Luther, a man struggling with his own terrible demons, who might be as dangerous as the depraved murderers he hunts.

The Philadelphia homicide squad's lone female detective finds her calling when she is assigned cases that have never been solved. Detective Lilly Rush combines her natural instincts with the updated technology available today to bring about justice for all the victims she can.

In 1953 at the hamlet of Grantchester, Sidney Chambers—a charismatic, charming clergyman—turns investigative vicar when one of his parishioners dies in suspicious circumstances.

An American anthology police detective series utilizing multiple timelines in which investigations seem to unearth personal and professional secrets of those involved, both within or outside the law.

A Las Vegas team of forensic investigators are trained to solve criminal cases by scouring the crime scene, collecting irrefutable evidence and finding the missing pieces that solve the mystery.

A detective in a small Pennsylvania town investigates a local murder while trying to keep her life from falling apart.

This drama follows Inspector Kurt Wallander – a middle-aged everyman – as he struggles against a rising tide of violence in the apparently sleepy backwaters in and around Ystad in Skane, southern Sweden. Based on the international best-selling books by Henning Mankell.

A modern-day drama about a crime-solving duo that cracks the NYPD's most impossible cases. Following his fall from grace in London and a stint in rehab, eccentric Sherlock escapes to Manhattan where his wealthy father forces him to live with his worst nightmare - a sober companion, Dr. Watson.

The murder of a young boy in a small coastal town brings a media frenzy, which threatens to tear the community apart.

A team of Vancouver investigators, led by homicide detective Angie Flynn, sets out to uncover the motive of each puzzling murder by discovering the killer's connection to the victim. Viewers get a glimpse of the killer before and after the crime is committed.

Follow the investigations of a team of NYPD forensic scientists and police officers identified as "Crime Scene Investigators".

Harry Bosch, an LAPD homicide detective, stands trial for the fatal shooting of a serial murder suspect. A cold case involving the remains of a missing boy forces Bosch to confront his past. As daring recruit Julia Brasher catches his eye and departmental politics heat up, Bosch will pursue justice at all costs.

Respected police officer John River, a gifted cop with a troubled mind, struggles to come to terms with the recent loss of a colleague, and chases a suspect across London - with tragic consequences. Now at odds with the authorities, River ends up in a precarious position as he seeks to bring closure to the mother of murdered teenager, who blames him for failing to keep his promise.

Marcella is shocked to the core of her being when her husband Jason leaves her unexpectedly, confessing he no longer loves her. Heartbroken, Marcella returns to the Met’s Murder Squad. Ten years ago Marcella gave up her fast-tracked police career to marry and devote her life to her family. With the abrupt end to her marriage and isolated from her 13 year old daughter and 10 year old son, Marcella throws herself into work to stop herself from falling apart.