Upcoming episodes, programme details and where to watch over the next seven days. All times are UK time.
In Florida, police investigate the disappearance of a reporter who was exposed to an addictive world of gaming. Across state a mum vanishes after a party. S1/Ep4
When the body of Celina Petersen is found dumped in an alley in Seattle, surveillance footage from across the neighbourhood reveals the shocking truth. S5/Ep12
Adrianne Robert was found dead by her roommate after a night out. Investigators use security footage to hunt for a calculated killer. S7/Ep9
Every parent's worst nightmare comes true when a schoolgirl disappears without a trace. But surveillance footage leads cops to a shocking discovery. S1/Ep2
A woman vanishes while on a Hawaiian vacation to celebrate her 29th birthday. Police trace her movements to a Waikiki hotel, covered by CCTV cameras. S7/Ep11
Andrew Nesbitt is found dead on his 46th birthday in his Wisconsin apartment after a night out. Officers turn to CCTV in local bars, cabs, and street corners. S5/Ep13
A grainy parking lot video is the lone witness to a Tacoma, Washington, father's tragic execution. Police rely on security cameras to find the killer. S7/Ep10
Police retrace a 60-year-old woman's movements after she goes missing in Council Bluffs, Iowa. CCTV footage reveals the lies of someone close to her. S10/Ep17
After Christopher Duncan disappears after leaving his apartment in Texas, police make a grim discovery. Surveillance footage points to a dangerous killer. S5/Ep7
When 69-year-old Ina Clare Richardson is found brutally murdered in a park, police turn to security cameras to piece together the puzzle of her death. S5/Ep5
When 12-year-old Alajawan Brown is shot dead outside a shop in Washington, near to an earlier shooting, police refer to CCTV to see if the two are connected. S5/Ep14
When 56-year-old Andy McGuffee turns up murdered in his burnt-out home, the Oklahoma State Bureau of Investigation looks to surveillance footage. S10/Ep19
In 2016, car salesman Hufracio Arteaga is found stabbed to death in his Michigan City office. Will surveillance cameras from a nearby building reveal the killer? S5/Ep9
When Carl Starke is shot dead close to his home in Florida, police turn to CCTV to help hunt his killer, resulting in a huge manhunt and shocking on-camera interview. S5/Ep6
When 37-year-old Natasha Cournoyer goes missing, her family and friends are desperate for answers. Police use surveillance video to track her final steps. S5/Ep15
Nursing student Michelle Le vanishes without a trace. Police discover CCTV footage of her car driving around a parking lot, but who is the driver? S2/Ep3
In 2015, care worker Torrance Cheeves is found stabbed to death in his Texas home. With no suspects and a trail of puzzling evidence, will CCTV offer clues? S5/Ep11
On Valentine's night, James Enright is stabbed to death near a station in Burnaby, Canada. Through CCTV, police discover it was caught on a phone camera. S5/Ep16
15-year-old Elizabeth Ennen was last seen when a friend dropped her home, but police find a piece of CCTV that turns the case in an unexpected direction. S2/Ep10
In 2009, 27-year-old Jessika Kalaher is found strangled in her car in Texas. With her wallet and car keys missing, detectives turn to security cameras for clues. S5/Ep8
A police officer is shot dead at point blank range at the Harris County Courthouse outside Houston, Texas. With no witnesses, can security cameras lead to his killer? S6/Ep1
In Tempe, Arizona, millionaire entrepreneur Rick Chance is brutally gunned down in a hotel room. To catch the killer, detectives turn to surveillance video. S2/Ep11
A loving wife and mother is found brutally murdered at home in Edmond, Oklahoma. Can security camera footage help detectives hunt down her killer? S6/Ep2