A dead man in a car trunk leads 5-0 to underground fight club tied to ancient Hawaiian martial art.
The Gallaghers take in Mandy's little sister when Carl heads off to "Cancer Camp."
Daniel Hardman returns to the firm he built in the hopes of destroying it.
Beyond football, there's a lot to enjoy about America's favorite unofficial holiday.
Fiona takes on a supermarket manager when he insists she handle his deli meat.
Hank wakes up from a drug-induced coma to find his heatbreaking ways have started a body count.
Jack gets closer to Mia as Vincent and Johnny learn not to mess with the Mormon mob.
George Takei brews up some moonshine and Kamekona takes to the skies as 5-0 searches for a boy's missing father.
McGarrett investigates a botched bank robbery while Danny finds himself on protecting lingerie models.
When a seductive therapist gets inside McGarrett's head, the team starts to doubt their leader.