Starting from the development of earlier series, Romanzo Criminale; how the collaboration between Sky and Cattleya happened; and how the whole cinema production setup had to be adapted for television. Narrated by Stefano Sollima.

Lydia and her new partner hunt a cleaning lady's killer. John and Ben rescue an officer during a bank-robbery shootout. Nate and Sammy investigate the murder of a gang member.

Sammy and Nate feel threatened when Sal calls in Lydia and Josie to help them solve a series of gang murders.

Alex confesses to Birkhoff her desire to leave Division. Amanda begins providing Owen with something he was never able to find -- memories of his real past.

Riggs and Murtaugh are drawn into a fatal world of conspiracy theories. Meanwhile, Riggs' relationship with Molly evolves and Murtaugh and Trish attempt to get Harper into a fancy pre-school.

Brenda's team investigates a Hollywood producer's murder.

Brenda does an internal investigation about a dead officer.

Lorelei Martins returns, determined to find out if Red John had a role in her sister's death, and Jane is forced to confess to Lisbon his part in Lorelei's prison escape.

Alex confesses to Birkhoff her desire to leave Division. Amanda begins providing Owen with something he was never able to find -- memories of his real past.

Ruzek witnesses a tragic accident on an icy bridge, leading Intelligence into a dark, sinister case involving sex trafficking.

Riggs and Murtaugh are drawn into a fatal world of conspiracy theories. Meanwhile, Riggs' relationship with Molly evolves and Murtaugh and Trish attempt to get Harper into a fancy pre-school.

Brenda does an internal investigation about a dead officer.

Lorelei Martins returns, determined to find out if Red John had a role in her sister's death, and Jane is forced to confess to Lisbon his part in Lorelei's prison escape.

Alex confesses to Birkhoff her desire to leave Division. Amanda begins providing Owen with something he was never able to find -- memories of his real past.

The Southland officers are sent out to capture a rapist impersonating a cop. While Lydia's reunited with her former partner, Russell, Sal's secret affair is revealed to his wife.

Lydia and her new partner hunt a cleaning lady's killer. John and Ben rescue an officer during a bank-robbery shootout. Nate and Sammy investigate the murder of a gang member.

Sammy and Nate feel threatened when Sal calls in Lydia and Josie to help them solve a series of gang murders.

Riggs and Murtaugh are drawn into a fatal world of conspiracy theories. Meanwhile, Riggs' relationship with Molly evolves and Murtaugh and Trish attempt to get Harper into a fancy pre-school.

Ruzek witnesses a tragic accident on an icy bridge, leading Intelligence into a dark, sinister case involving sex trafficking.

Brenda does an internal investigation about a dead officer.

Lorelei Martins returns, determined to find out if Red John had a role in her sister's death, and Jane is forced to confess to Lisbon his part in Lorelei's prison escape.

Alex confesses to Birkhoff her desire to leave Division. Amanda begins providing Owen with something he was never able to find -- memories of his real past.

It's Christmas time and the Murtaugh family is headed to Hawaii. However, Murtaugh's vacation is put on hold when he and Riggs are called to a homicide and the victim is an old friend. Meanwhile, Riggs gets a surprise call from a relative just in time for Christmas.

Maggie and Goodwin's friendship is tested as tensions rise during the nurses union's negotiations with the hospital. Ripley and Archer treat a skateboarder struck by an emergency vehicle. Frost helps a young boy abandoned by his mother.

Maggie and Goodwin's friendship is tested as tensions rise during the nurses union's negotiations with the hospital. Ripley and Archer treat a skateboarder struck by an emergency vehicle. Frost helps a young boy abandoned by his mother.

When Rose goes missing, Alec quickly discovers this is no ordinary kidnapping; while Rose plays a dangerous game to stall for time, Alec takes matters into his own hands to find her.

The CBI team investigates when the body of a female army medic who worked with soldiers with PTSD is found near a military base.