Logan, wanting a new course in life than being a lifeguard, decides to write and direct a low-budget action flick at the beach using a drugged shark as the villain, with Caroline as the star. But things take a unexpected turn when a very great white shark appears and attacks Cody and a number of other swimmers in the area as Mitch and the rest of the squad try to hunt it down... 'Jaws' style, while Logan sees an opportunity to grab for his movie.
Mitch judges a beachside beauty contest, but is tempted by two of the contestants, who both vie for his vote. Caroline's acting teacher puts her relationship with Logan in jeopardy. Logan designs a new rescue vehicle. Donna is blackmailed by a secret from her past.
Mitch is the prize in a bachelor auction, but things go awry when he and his date end up stranded on a deserted island. Cody competes with his roller hockey team to win a championship.
A heatwave precedes a visit to the beach by the President of the United States, as Mitch encounters a bumbling Secret Service Agent. Cody faces an audit by the IRS. Caroline thinks no one has remembered her birthday.
En route to a survival training weekend, Mitch and the junior lifeguards are trapped in a tunnel cave-in caused by an earthquake. Donna's Playboy past puts her future at Baywatch in jeopardy.
After rescuing a group of fishermen and tourists from a huge pier fire, Samantha and L.A. fire chief Captain Huntingdon form a rescue firefighting team of six life guards and firefighters, called the Search and Rescue Unit, for such conditions and Cody, Neely, Jordan, and Newman try out for the unit and meet their firefighting counterparts. Their skills are put to the real test when the new group of Cody, Neely, Catalina lifeguard Rick Jenner, and firemen Jessica, Clay, and Terry are sent on their first mission to rescue two men in a partially submerged basement of a fire-ravaged building.
Mitch unknowingly swims in polluted waters after Baywatch is contaminated by toxic waste. After he falls ill, Neely, C.J. and Cody must come to his rescue and discover the source of the illegal dumping and the nature of the poison.
Mitch is approached by Molly McCoy, the young editor from 'Flash' magazine, who asks to nominate himself as Bachelor of the Month for her magazine, complete with a photo and video shoot. But Mitch has other things on his hands in helping Newman and Donna try to catch a large Portuguese Man-O-War jellyfish that is infesting the area after having stung a swimmer.
Stephanie and Tom go on their honeymoon on a two-sail schooner with a group of six troubled teenagers. Mitch and Neely also tag along to help keep an eye on the kids and lend a hand on the ship. But hardly when the ship is out of port the radio breaks, leaving them with no warning when a massive hurricane strikes. When the ship begins sinking, Stephanie ends up losing her life after she is struck by a 20-foot section of the sail trying to save one of the kids.
Mitch rescues the life of a talk show host, who then invites him to appear on her show. C.J. is convinced that a stray dog found by her and Caroline possesses the reincarnated soul of the late Stephanie.
While rescuing three inner city youths, Caroline receives help from a mysterious boy who mysteriously vanishes. Sparks fly when Neely is reunited with her ex-husband when she shows up unexpectedly at Baywatch.
Manny tries to help a young boy from his old neighbourhood escape gang life. Mitch and Samantha's are forced to reveal their secret romance to the rest of Baywatch, thanks to Neely's big mouth.
Sam, Neely and Caroline witness a military jet crash into the ocean, then learn it contained a deadly virus. They must use a new deep-water scuba system to retrieve it. Cody, C.J. and Newmie try to shut down an illegal nude beach, which causes danger for its spectators.
Caroline is sued by the mother of a victim of a failed rescue. C.J.'s desire for motherhood hits a snag when she realises Cody's not ready for that type of commitment.
Neely and Mitch try to help a manic-depressive female bodybuilder. Newmie's potential romance with a beautiful woman hits a snag because she doesn't English.
In this take on 'Darkman' meets 'Phantom of the Opera', a mysterious, disfigured man, whom the public dubs "the phantom lifeguard," is lurking under the Malibu pier and the dunes of Baywatch and who is sending C.J. mysterious gifts wrapped in Edgar Allan Poe poems.
