An earthquake shakes Baywatch headquarters and causes many problems for the lifeguards and for one, a life altering decision is made.

Eddie believes he sees a ghost by the water and the others believe that he is losing his mind. Hobie learns that a friend's pet is going to be euthanized for an alleged attack and resolves to help both of them.

Craig joins Cort and Eddie on a trip to Mexico for a long overdue vacation but things turn out very differently from their expectations.

Mitch, Craig and Garner go on a hang gliding trip that results in a series of accidents for all three.

Mitch Buchannon has just been promoted to lieutenant. Mitch and his ex-wife Gayle have an argument about what's best for their son Hobie. Eddie Kramer is the top rookie in the rookie class of '89, and Shauni McClain is one of the last ones to qualify. Shauni starts off as a terrible lifeguard, but the experienced Jill Riley teaches her how to become a good lifeguard.

Gayle and Mitch continue to fight over Gayle's plan to take Hobie with her. She ultimately changes her mind after Hobie risks his life to save a drowning young girl. A plane crashes into the water near the beach with the occupants, after they are rescued, looking to recover a suitcase of stolen money that they had with them. Captain Thorpe decides to join Eddie and Shauni on their tower in order to teach them.

A new hotel opens near the beach and a string of murders occur around the same time which convinces Craig the two may be connected.

Eddie's life is torn apart by the accusation of statutory rape from the overprotective father of a lonely teenager trying to make friends lied to a group of other teenage girls about her encounter with Eddie. Mitch deals with the anger of a paraplegic former lifeguard.

Drew shoots at the raft. Shauni is taken hostage, and pushed off the cliff. After Eddie and Mitch save her, she finds out that she's not pregnant. Eddie proposes to her. Mitch climbs down with the help of a rope and finds the golden boot; Jed arrives at the trailer. Eddie marries Shauni and they move to Australia.

Hobie falls in love with a girl in junior lifeguards; Mitch and Jackie have a number of interrupted dates; Matt and Summer discover that they love each other. Thinking he is romantic, Hobie takes the girl on jet ski to a cove near a seaside monastery to kiss her as the bells toll, but they get caught in a dangerous current.

During junior lifeguard training sessions, Matt deals with Hobie's newest friend, Carter, who is ashamed of his father, Simon, who happens to be a dwarf.

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.

A mysterious figure called "The Phantom Lifeguard," begins making rescues and disappears before being identified by anyone. While Mitch thinks the Phantom Lifeguard is an outsider, Cody and J.D. think the unseen hero of the day is getting his/her information from inside the department.

Los Angeles is having a heat wave and it's going to be a busy day for the lifeguards.

An illegal offshore casino causes problems for Cort and some of his fellow lifeguards. Hobie thinks his English class is going to be a breeze when Mitch starts dating his teacher but soon learns otherwise.

Mitch falls for a beautiful woman he has rescued, never dreaming she is actually a murderess.

Harvey and Mitch pursue and capture a disgruntled gambler turned high-seas pirate. Meanwhile, Eddie struggles with the disapproval of Shauni's father. While Eddie is walking away from Shauni's sisters engagement party, Kim gets her hand stuck in the pool pump and luckily Eddie saves her.

The lifeguards compete against each other to determine who is the best; Stephanie and CJ move in together but things get complicated for both of them.

Guido tells Mitch that he has started a new business called Windows by Guido; a Captain named Rolf Angstrom visits headquarters; a drug dealer escapes.

April's mother and her 12-year-old younger brother, Charlie, arrive for a visit where Mitch and Hobie try to make the best of the weekend with Charlie who is revealed to be dying from a rare form of cancer that April refuses to accept.

A long bad day begins when after Mitch rescues a struggling swimmer, the local Disease Control Center places the entire Baywatch Headquarters under quarantine after the swimmer shows symptoms of a deadly virus.

Mitch Bucannon, on leave in Oahu, Hawaii while he sorts out his thoughts during a mid-life crisis (his failed romance with Neely, his mother's recent death, and Hobie living on the East Coast), decides to form an international team of lifeguards in Hawaii called 'Baywatch Hawaii' for saving lives after a rescue of a family on a remote beach in which a little girl is put in a coma after being submerged.

During the first week of training for the new lifeguard team of Baywatch Hawaii, competition between Jessie and Kekoa, as well as Jason and J.D. threaten to turn the tryouts into an all-out war. Jason, at Kekoa's advice, visits an old Hawaiian native to look into his true Hawaiian roots, and Allie takes a job as a helicopter tour pilot to make some extra money for herself.

Instead of attending summer school, Hobie decides to go power skiing with two friends, whose recklessness leads to a tragic accident. Eddie's lack of financial resources is revealed when Craig finds him sleeping in one of the lifeguard towers.

Mitch's former wife is planning to move to Ohio and wants to take Hobie with her. Upset over the squabbling that ensues, Hobie takes off with a friend and runs into pirates on a nearby island. Eddie and Shauni squabble after Shauni accidentally hurts Eddie.