Leigh goes hang gliding with Sam Parks, a daredevil pilot who puts her life in danger. Things go horribly wrong when Kekoa's cousin, Nani, parties on a boat with drunken frat boys and ends up alone in the ocean.
Sean and Jenna clash when she tries to close Baywatch so investors can develop the property. Carrie is afraid she's not lifeguard material after her reluctance to jump into the water from a hovering helicopter.
A teenager's waverunner causes accidents and his father threatens to sue Baywatch for not rescuing him ahead of his victims. JD takes out his personal problems on Sean. Zack relentlessly pursues Carrie while she pursues Jason.
Sean clashes with Jenna. A new love triangle emerges between new recruit Zack and rookie hopeful Carrie, who's more interested in Jason. Sean and new lifeguard Leigh Dwyer confront daredevil Cliff, whose dangerous antics disrupt the Baywatch team.
Mitch goes undercover to stop an ex-Navy SEAL turned eco-terrorist from detonating a deadly underwater explosive device. When Mitch's dive gear floats to the surface, Sean and the team fear the worst.
Kekoa, Dawn and Allie reexamine their femininity. Jason rehearses a love scene with a sexy actress. JD tries to rebound from his breakup with Jessie.
Sean has mixed feelings about Jenna, the beautiful but smug new head of North Shore Lifeguards. When nudists protest on the beach, Sean and Jenna have to work intimately together to save the day, if they don't kill each other first!
Dawn and Sean are drawn to the strange and spiritual powers of the mind. Kekoa, Allie and Jessie try to save lives after disaster strikes at a party.
A dark secret from Dawn's past could jeopardize her career as a Baywatch Hawaii Lifeguard. JD puts his new invention, a double scuba fin, to the test trying to rescue a young boy being sucked into whirring propeller blades in a storm vent.
Allie is terrified she may lose the love of her life when Nick gets the bends in a daring attempt to rescue a mini-sub on the ocean floor.
Allie discovers a rare Hawaiian coin from a ship that sank after the Pearl Harbor attack. Sean lets the team dive for sunken treasure provided it doubles as a training exercise. The deep-sea dive leads to discord, dissent and explosive danger.
The Team hunts men mutilating sharks for their fins. Jason, who's always feared sharks, learns to accept the local tradition that sharks are sacred protectors of the Hawaiian Islands.
Sean is faced with a life-or-death decision during a daring cave rescue in which Kekoa faces her greatest fear. Hobie plans to get married, but Mitch is at odds with his fiancée's obnoxious parents.
Mitch envisions an International "Top Gun" style lifeguard school in Hawaii. He invites Sean Monroe to lead the new team, which will include a variety of highly rated lifeguards from beaches around the world.
Alex's search for the creator of several elaborate sand castles is interrupted when she gets stuck entertaining her best friend's fiancée, who falls madly for Mitch. Cody loses his cool when his new boat is stolen while he's scuba diving with Newmie.
April and Jessie search for the perfect celebrity host for a seaside beauty contest. Mitch and Alex help Manny adjust to his paralysis.
After Manny suffers a life-altering injury during a rescue, April tries to save him from himself. Neely meets her match in Alex when she tries to discredit Mitch.
Alex tries to save a diamond smuggler whose partners want him to "sleep with the fishes." Neely makes Hobie a tempting offer that divides the Buchannon household.
Cody learns a lesson in love when he and Mitch help a troubled violinist escape her dangerously overbearing mentor with a secret agenda. Meanwhile, Alex sets out to prove her worth at Baywatch by retaking the grueling rookie test with Jessie.
While team Baywatch prepares to compete against the Australian guards, Jake must choose between staying down under with his son or returning home. The competing lifeguards must put their intense rivalry aside to save a life.