Watch Hawaii Five-0 Season 4 Online
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A top secret Chinese satellite is connected to a triple homicide and Grover takes Danny's mother on a ride along on Hawaii Five-O.
As the team investigates when a realtor's body is found in the walls of a house, Danny is stunned when his mother (guest star Melaine Griffith) comes to visit on Hawaii Five-O.
When an escaped convict wants Five-0 to prove he is innocent, he kidnaps McGarrett and Danny on Hawaii Five-0.
Chin is questioned by Internal Affairs about his father's murder 15 years ago on Hawaii Five-0
McGarrett helps Grover find his missing friend under suspicious circumstances on Hawaii Five-0.
It's Christmas time in Hawaii and Chin ends up in the crosshairs of a possible serial killer on Hawaii Five-O.
When someone tries to murder a Pearl Harbor veteran, the Five-O team ends up using evidence linking back to a WWII internment camp on Hawaii Five-O.
The Five-O team investigates the death of Secret Service agent before the President visits the island on Hawaii Five-O.
McGarrett and Grover are tasked by the Govenor to work together in the name of National Security on Hawaii Five-O.
McGarrett does double duty while investigating the murder of an ATF agent while trying to help Mary with her adopted baby on Hawaii Five-O.
The case of a zombie-like man being shot on Halloween takes an even weirder turn for the team on Hawaii Five-O.
Adam may make the ultimate sacrifice when it comes to saving Kono while Catherine's new job takes an unexpectedly deadly turn on Hawaii Five-O.
A runaway bride is a suspect when one of the wedding guests is murdered on Hawaii Five-O.
A missing ancient artifact may hold the key to the investigation into a double homicide on Hawaii Five-O.
Kono and Adam's secret location is discovered and a Texas Ranger ends up on the islands looking for his missing daughter on Hawaii Five-0.
On the season 4 premiere of Hawaii Five-O, Chin Ho is trapped inside Five-O headquarters with terrorists, Kono is on the run, and McGarrett takes some extreme measures to rescue a kidnapped Catherine.