As the team races to stop a violent band of armed robbers, the search is complicated by civilians using a public safety app that encourages vigilantism Street receives difficult news that alters his future.
When a robbery crew holds up the iconic downtown Los Angeles library, the team discovers that stolen architectural drawings could lead to a major threat against the city the squad is surprised by the arrival of a new leader.
In Mexico, Hondo teams up with a local cop for a dangerous rescue mission, only to find himself with a target on his back in Los Angeles, Hicks considers disbanding the team for good.
Banff, Alberta avalanche control at Ski Lake Louise snowshoeing at the Fairmont Chateau Lake Louise climbing a frozen waterfall.
New ways of cultivating fresh and nutritious food a garden in a parking lot distinguishing fruits from vegetables food that is wasted.
Scientists measure the health of forests invasive plants using sonic-tomography to look inside trees why the pitch pine tree can withstand occasional wildfires an urban forest in Los Angeles.
Fearsome predators: owls leopards.
Examining some of the animal kingdom's fastest sprinters, like the cheetah taking a look into the mysteries of animal intelligence with dolphins and orangutans.
A woman hires Nick to track down the mother who deserted her as a child.
A man who disappeared on his wedding night may have sold his employer's high-tech secrets.
Nick's (Rob Stewart) former girlfriend, about to be married, asks him to protect her from a murderous ex-lover. With Carolyn Dunn.
A serial killer stalks Sylvie.
The team is thrown into a highly political case after four members of the Taliban are shot and one is kidnapped in New York with no record of their entrance into the country OA struggles to open up to Gemma about his past in Afghanistan.
After an FDIC security guard is killed while tending to a pregnant woman in distress, the team works to locate the woman and the killer who took her hostage OA and Isobel worry about Maggie as she navigates taking care of Ella.
When a retired FBI agent is tortured and killed while working a security job, Scola and Nina go undercover as a married couple deep in the diamond game as the team tries to find out who is responsible.
After an employee of the U.S. Army is shot in an industrial park, the team works to track down the killer who reveals a larger plot at play Tiffany continues to struggle with the guilt surrounding Hobbs' death.
When a bombing at a local restaurant leaves several injured or dead, including a congresswoman and someone close to Isobel, the team races to apprehend the suspect before another explosive goes off.
After multiple people are targeted and killed with a poisonous gas in broad daylight, the team races to find the killer Maggie continues to explore motherhood.
When the director of a Brooklyn migrant center is abducted and held hostage along with his wife, the team must work quickly to meet the demands of their kidnapper Maggie picks Jessica's brain about motherhood.
The team investigates a killing in which the crime scene points to a possible protégé of Pelant Angela second-guesses the decision to move to Paris Brennan and Booth consider employment options.