Three months after quitting the Phoenix Foundation and moving to Nigeria, Mac puts aside his differences with his father and returns when he hears Jack is the target of a murderous dictator he double-crossed.
MacGyver gets a shocking surprise when he tries to tell Matty he's quitting the Phoenix Foundation.
A man is shot as his daughter is abducted Danny tries to reunite his parents Jerry finds a code on McGarrett's champ box.
A triple homicide is linked to a secret, downed Chinese satellite Danny's mother goes on a ride-along with Grover.
The team investigates the death of a real estate agent whose body was found in the walls of one of his listings Danny's mother visits with unexpected news.
An escaped convict who wants Five-0 to prove his innocence abducts Danny and McGarrett Grace punches a person at school.
Chin is questioned about his father's murder and how his relationship with Malia and her family could have adversely affected the investigation.
One of Grover's friends disappears after apparently committing a murder.
An investigation involving a potential serial killer puts Chin's life in danger Grace and Danny find a mysterious puzzle box.
When a woman is murdered at an exclusive club, Horatio must search through an elite guest list to find the killer.
The team loses one of its own when a psychotic genius runs wild in Miami.
A serial killer leaves cryptic hints and dead bodies for the team.
The team investigates its own department when Horatio's ex-girlfriend is killed in an explosion.
When a suburban mother is murdered, the CSIs uncover her family's dark past Delko continues his undercover mission.
The team is hired by the Department of Defense to test the security at Fort Knox by trying to break in and steal a precious artifact.
A deadly tornado threatens the lives of Team Scorpion during a mission to recover the remains of fallen Marines in Vietnam.
FBI Special Agent Raymond Isler asks Pride for help with an off-the-books opioids theft investigation he is personally invested in Percy works under cover as a getaway driver, with Isler as the muscle for a job tied to the case.
A petty officer is murdered while in town to help a refugee family Wade works on the special election campaign for Mayor Zahra Taylor that takes place during Mardi Gras.
A petty officer's murder leads the team to a night club where Pride's mother used to perform Lasalle must return home to Alabama after receiving an unexpected call from his family.
Sebastian's high school friend asks for help when her business partner is killed at a gaming convention FBI Special Agent Raymond Isler believes Adrian is the hacker that the Cyber Crimes division has been tracking for years.