The Best Episodes Written By Paul Grellong

Team Scorpion must stop a catastrophe on Christmas Eve when heavy rain creates a large crack in a dam, putting an entire town in danger.

Team Scorpion must help Ralph when the FBI questions him after his dark web game play inadvertently reveals the location of a CIA safe house and results in the murder of CIA operatives.

Team Scorpion’s simple job at the Los Angeles Natural History Museum turns deadly when they discover thieves robbing a rare gem exhibit in order to get materials needed to enrich a nuclear bomb.

Harry Langford helps Five-0 investigate a series of murders that follow the plot of a fabled unpublished crime novel from the 1920s. Also, Tani and Junior's friendship takes a meaningful new turn.

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Taylor and Mira must set aside their differences when they encounter a prehistoric enemy; Jim closes in on the mole.

Team Scorpion try to protect Cabe's ex-wife, after she uncovers evidence that suggests foul play in the death of a prominent congressman.

Sylvester goes undercover in a federal prison in order to save the lives of three judges, but the team must help him escape when his life is threatened.

Team Scorpion’s mission to recover the remains of fallen Marines in Vietnam is threatened along with their lives when a deadly tornado heads directly towards them.

While en route to Toby and Happy’s honeymoon, Team Scorpion’s plane crash lands on a remote deserted island, leaving them all with little hope for rescue.

To fix a Los Angeles nuclear reactor that's on the verge of a cataclysmic meltdown, Walter and the team must reluctantly enlist the help of a troubled former member.

While on a mission to save lost hikers, Team Scorpion’s helicopter crashes, igniting a massive wildfire that quickly closes in on them. Also, Sylvester must help their injured pilot who is unable to make it to safer ground.

While decommissioning an old nuclear missile, a simple accident causes Team Scorpion to endure exposure to toxic vapor while trying to prevent the nuke from detonating. Also, Paige confronts Happy about constantly tagging along with her and Walter.

Team Scorpion inadvertently crashes a bank robbery in progress and is taken hostage. Also, Sylvester’s feelings for Florence grow.

On Christmas Eve, when Walter chooses work over spending quality time with his friends, he falls down the stairs and hits his head, and as he lays unconscious, he enters a dream world where Team Scorpion never existed.

As Charlie, Rachel and Gene question Monroe's true allegiance, Miles himself is weary of his former friend's intentions. Meanwhile, Aaron continues to have visions that lead to endless questions.

Miles leads the rebel squad out of Philadelphia and away from Monroe’s helicopters and machine guns. Meanwhile, a guilt-ridden Rachel tries to redeem herself by providing power to the rebels, but once again must leave her children, Charlie and Danny, behind. As if there wasn’t enough heat, romantic sparks ignite between Miles and Nora.

When Gene decides to assist the town of Willoughby, Rachel and Charlie feel compelled to help too as Miles and Monroe continue to join forces in order to survive.

McGarrett crosses the line and is arrested while investigating the death of his former SEAL buddy, who died while making an emergency landing on an aircraft carrier, and the only survivor is a baby. Also, Adam returns to Oahu with some devastating news about his marriage.

Fugitive hacker Aaron Wright resurfaces to ask Five-0 for help when his co-workers at the NSA, which he has been working for, are all murdered. Also, Junior speaks at the parole hearing of the drunk driver who killed his sister.

It's Thanksgiving, and while Junior and Tani track down the thief who robbed his parents' home, Five-0 investigates the murder of a beloved philanthropist and the theft of his ultra-valuable koa tree. Also, Danny moves in with McGarrett.

When Adam's girlfriend, Tamiko, is kidnapped right in front of him, he shuts out Five-0 and breaks all the rules in order to get her back. Also, Five-0 investigates three seemingly unconnected homicides.

Life-threatening dangers abound on all sides as the Rebels infiltrate the Tower. Miles' leadership abilities and character are sorely tested as well as his feelings for Rachel and Nora. Aaron's genius comes in handy while Tom Neville and Randall Flynn bring new meaning to the dark side.

Aaron awakes to find himself in a world with power, married to Priscilla and running his company. As he gets the feeling that something isn't quite right, familiar faces begin to appear.