Cort and Eddie train lifeguards at a water park, but someone is vandalizing the waterslides, putting people's lives in danger. Meanwhile, Captain Thorpe wants Shauni fired for posing in a provocative calendar.
Craig, Cort and Eddie take a road trip to Mexico, but their vacation south of the border turns ugly when they tangle with an angry American tourist. Meanwhile, Captian Thorpe becomes Mitch's uninvited house guest. Hobie develops a crush on Shauni.
Mitch gets a surprise visit from his old, mischievous Navy S.E.A.L. buddy and ex-Baywatch lifeguard, John Cort, adding serious problems in their already complicated relationship. And Shauni and Jill fight a battle of the sexes against a shady vendor.
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.
After their plane crashes, two robbers attempt to retrieve their suitcase full of stolen money from the ocean. Meanwhile, Mitch and Gayle go to court over custody of Hobie.
A wealthy older man drowns under suspicious circumstances in front of Jill Riley's tower. Jill endures the pain of losing her first victim, becoming obsessed with unravelling whether his death was an accidental drowning, or murder.
Hobie overhears his divorcing parents arguing and boats away to a deserted island with two friends, only to have their boat drift away, leaving them stranded on the island with modern day pirates!
Eddie must come to terms with his past when he confronts a gang of "surf rats" lead by a former friend from his reform school days. Trevor begins to doubt his lifeguarding skill when his girlfriend almost drowns because of his arrogance.
During the hottest day of the summer, Craig has to choose between his career as a lawyer and the job he loves being a Baywatch lifeguard. The choice is made when two boys get trapped in a storm drain which is rapidly filling with water.
Playing hooky from summer school, Lt. Mitch Buchannon's son Hobie gets dangerously involved with reckless jet skiers.
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.
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.
Jenna invests all her money with an investment banker who turns out to be a con man. Derek Hart is the kind of man JD wishes he was. But when Derek jumps off a cliff, JD and Jason dive in to save his life, in more ways than one!
A hurricane hits Hawaii. Sean and Jenna get trapped in a WWII bunker and must put their hatred aside and work together to escape. Zack is trapped in headquarters with a thrill-seeking reporter that puts their lives in danger to get her story.
Baywatch faces two bizarre lawsuits. Kekoa's father wants her to break up with JD and quit lifeguarding. Zack runs the new Junior Lifeguards program. A government Investigation puts Sean's job, and the future of the Training Center in jeopardy.
Carrie rescues a spearfisherman who starts obsessively stalking her. Sean, Jason and Zack save her from his deadly pursuit, but can Carrie feel safe saving strangers again? Sean is jealous of Sam dating Leigh, but Leigh has doubts about Sam.
A series of fake rescue calls puts Sean, Jenna and Zack's lives in danger. Jenna replaces Councilman McKenna, giving her the power to shut down the Training Center! JD tries to get Kekoa's father to bless their relationship.
Leigh suspects Sasha, an attractive tourist, of murdering her husband. Betraying Leigh, Jason seduces Sasha with shocking results! Sean is shocked when he discovers the truth about his ex-wife's visit to Hawaii.
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 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.