Jill teams up with Trevor to win a beach volleyball tournament, but all she really wants is to beat her former lover's team. Eddie and Shauni team up to rescue a young girl trapped in an armored car that topples off the pier into the ocean.
Craig gets jealous when Mitch reunites with his and Craig's old flame. Meanwhile, Eddie buys a classic Mustang for cheap, only to get arrested for possession of a stolen car.
During a tropical storm, Eddie and Shauni take refuge in the Pomeroy's loft, turning a cold night into the start of a hot romance. In the downpour, two escaped convicts shoot Garner, then break into Baywatch headquarters and take everyone hostage.
Eddie warns Shauni that her new boyfriend Andrew is not a good guy. She ignores Eddie until Andrew gives her a black eye. Meanwhile, Craig and Mitch must stop an out of control party boat before it crashes into the crowded Santa Monica pier.
While housesitting for Craig and Gina, Eddie takes in a runaway whose life is threatened by her mobster boyfriend. Meanwhile, Trevor enters Baywatch rookie school to become a certified LA County lifeguard.
Several people are murdered at the beach by a mysterious man in ghoulish make-up and Eddie is knocked unconscious by what he describes as a "cretin." Eddie's report is met with skepticism until the identity of the killer is dramatically revealed.
Craig rescues a woman that develops a fatal attraction to him, placing Craig's wife in mortal danger. A fishing trip goes horribly wrong when the boat explodes and Mitch and his mentor Al have to rescue its passengers, including Mitch's son Hobie.
Sean has a decision – move to Australia or stay in Hawaii. Zack sees Leigh naked, leading to complications with her fiancé Sam. Kekoa dumps JD and become a party girl. When Sam leaves Leigh at the altar, Sean asks Leigh to marry him instead.
For a rescue, Sean is awarded a free week at Hilton Hawaiian Village, which he declines. Zack pretends he's Sean and enjoys all the freebees, until Sean shows up! A pretty fashion photographer thinks Jason has top model potential.
Leigh takes over at Baywatch while Sean, Jason and Zack go to compete in a 12-mile race of natural obstacles. Jessie's presence at the race creates turmoil. Leigh and Jenna pretend to be lesbian lovers.
Investigating toxic dumping, Sean and Leigh end up chained inside a chamber slowly filling with toxic seawater. Can Sam get them out in time? To raise money, Jason and Zack have to hula dance in grass skirts in front of a lot of women.
Kekoa is devastated when Jessie tells JD that he's the father of her child. A rescued body boarder is paralyzed. Sean has a romantic encounter with a beautiful, woman he thinks might really be Pele, the goddess fire.
Zack corrupts the headquarters' computer system forcing everyone to work in the Dark Ages. Sean is freaked because a major donor is about to arrive in the midst of chaos. Jason saves Brit from her ex.
Zack is devastated when Sean promotes Carrie instead of him. Zack and Jason befriend a man and his teenage daughter who harbor a dangerous secret. Zack supplies a boat to escape to Maui, but disaster strikes before they get there.
Sean's incredible guilt after a surfing accident leads to a crisis of faith. Zack has to choose between loyalty to his Baywatch teammates and his competitive ambitions.
Sean confronts a "shark tour" operator dangerously dumping chum to lure sharks. A tourist who wants to be a hero to impress his son keeps interfering with Jason's rescues. JD and Kekoa try to keep their passionate relationship a secret.
Jenna convinces ruthless Councilman McKenna to close the Training Center. Sean suspends Zack after he severely injures JD during a rescue. Kekoa expresses her deep love for JD – but to Leigh! Zack sees a ghostly woman from his dreams.
To avoid jail, Danny joins Team Baywatch. Leigh doesn't trust him. Kekoa battles her father over her lifeguard career and moves out. JD, Zack and Jason hustle two gorgeous women who turn out to be con artists who turn the tables on them.
A plane carrying a donor heart crashes, and it's up to Jason to makes a desperate dive to retrieve the heart before the patient dies. Two hooligans steal a car and end up trapped underwater. Jenna tries to get Leigh to turn against Sean.
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.