McGarrett investigates a cold case from the s, one that his grandfather and the famous Honolulu detective Chang Apana worked on, and he tries to deduce how the case could have been solved. Also, McGarrett and Danny get ready for the opening of their restaurant.
The chefs must create a dish using potatoes as the key component; the pressure becomes unbearable for one chef, leading to a chaotic dinner service.
Fiji and Manfred try to get to the bottom of who or what is trying to kill Bobo. A guilt-ridden Rev struggles with the weight of his past. Joe embraces his new night job, unbeknownst to his husband.
Vanessa's mother comes to visit and hits it off with Ed; Mandy and Kyle tutor Boyd, but they may be the ones getting outsmarted.
Feeling left out by her friends, Andi spends time with Amber Andi and Celia pick out Bex's wedding cake Bowie helps a guitar student break some bad news.
Guests: Bob Woodward, Sarah Silverman, Cornell Belcher, Katty Kay Bret Stephens
An unexpected day off provides the opportunity for a last-minute bachelor party. Collective inebriation follows. John fully embraces the celebration with his wife and friends until the time line for his mission abruptly moves up.
Recent events tell a story that could reveal John's plan to assassinate Cantar Walley, so John takes preemptive measures, risking himself to divert attentions and create the illusion that the story is over.
Rick drafts a Gold Rush vet and former member of team Hoffman to save his season. Tony and Monica fire up their wash plant as they start to battle Parker to beat him to the gold.
Lucky's scheming cousin, Julian, is up to his old tricks when he goes to the city to find his future and comes back with a hot air balloon.
Edward's captor is revealed. John prepared for a dangerous act in his first step toward the assassination of Cantar Walley, just as Walley's elite security team arrives in Paris.
John gets closer to completing his perilous assignment, only to have matters jeopardized by a childhood mistake. Friends get involved in an unprecedented and gravely consequential way.
John acts against standard protocol, which alerts adversaries of his whereabouts and necessitates the abandonment of the John Lakeman cover identity, jeopardizing all.
We finally find out what butch lepray wants with lucky and Jim what unfinished business Find out this Friday.
Drunk and stoned, John breaks into Cantar Walley's compound. Alice considers the cost of betraying her father-in-law in order to protect her husband. In the meantime, Agathe finds a powerful new ally.
John must make a choice at the train platform - be free from his obligations and adversaries by letting Agathe take the money or pursue her in an effort to protect his brother, father, and country.
When Nia and Booker throw an epic 13 birthday party with no moms or kids allowed, they’re forced to tell Raven and Levi they can’t attend.