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Hina and Kainalu assist the U.S. Coast Guard in searching for two missing snorkelers left behind in the middle of the ocean; Sonny takes matters into his own hands about Vince; Em receives a job offer from a very rich person.

Rescue: HI-Surf

Let Go

While monitoring the beach, Laka and Will notice a toxic smell coming from a van and discover a kid unconscious and surrounded by drug paraphernalia; Em befriends a disabled veteran; Hina finally confesses her feelings to Kainalu.

Flowback

Will and Em race to rescue a windsurfer that wipes out and suffers cardiac arrest; Capt. Sonny reunites with Ocean over a family lunch and Em realizes her mom is back to her old ways; Hina tries to hide her jealousy over Kainalu's new relationship.

Sea Change

Em takes the day off to spend time with her mom, but races into action when she comes across an unresponsive cave diver; Will confides in Vince about his personal anger issues; Laka searches for a missing local.

Pono

The team searches for two missing teenagers; Will does not get along with District 7's new team member; Em receives a surprise visit from her estranged mother.

South Winds

The team races to rescue unresponsive cliff jumpers; Hina tries to navigate family issues; Will and Em hope to get over each other by rebounding with other people.

Ripple Effect

Capt. Sonny and the team discover a literal minefield on the ocean floor; a hugely popular influencer will do anything to capture viral content for her massive following.

Depth Charge

The team is on high-alert when a tsunami advisory is sent out following an earthquake; as the state of Hawaii is under an evacuation order, Captain Sonny has bigger issues when Ocean skips school and he can't find her.

Surge

Em and Will's relationship struggles as they navigate the return of his fiancée; Kainalu asks Laka for help; the team races to rescue a group of locals involved in a serious accident while riding an inflatable Supsquatch.

Caught Inside

The team races to the rescue in the aftermath of an ATV accident; romantic tensions are high between Em and Will as well as Kainalu and Hina.

Riptide

Christmas cheer is in the air as the lifeguards prepare for their annual holiday toy drive; while surfing, a local grandpa has a heart attack and is rushed to the hospital; Sonny tells Laka he is not ready to become a lieutenant.

Aftermath

Sonny, Em, Will and Laka look for missing paragliders that were pushed into the ocean by a down draft; Kainalu invites Hina to a party with his ex-girlfriend; Jenn doesn't think Laka is serious enough for her; Sonny puts in his notice to retire.

Drop In

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An action-packed drama that follows the personal and professional lives of the open-water lifeguards who patrol and protect the North Shore of O'ahu -- the most famous and dangerous stretch of coastline in the world.

S1 E18 | Flowback

E19 | Let Go

E18 | Flowback

E17 | Sea Change

E16 | Pono

E15 | South Winds

E14 | Ripple Effect

E13 | Depth Charge

E12 | Surge

E11 | Caught Inside

E10 | Riptide

E9 | Aftermath

E8 | Drop In