Kaye is reunited with old flame Wes Masters. Stephanie undergoes surgery for melanoma performed by her doctor and boyfriend Tom, who plans a romantic surprise for her when surgery is over. Caroline catches Logan cheating on her with Neely.
After Matt is stung by a poisonous fish, he and Mitch find a village where a young woman offers to help them, resulting in all three of them running from her jealous suitor. Logan's selfish behavior puts his relationship with Caroline in jeopardy.
Logan must help his friend Carmen raise $50,000 to keep her ranch, and Jessie Lee Harris is back in town just in time to help. Mitch finds himself in a deadly race for justice during his vacation in Baja, Mexico.
A mysterious, unseen creature begins attacking beachgoers, and it is up to the Baywatch team to find the creature. Meanwhile, Inside Sports Magazine wants a lifeguard for their swimsuit issue. Neely and Caroline compete for the cover.
Caroline blames herself for a teen's death in a fiery nighttime boating accident and goes through Critical Incident Stress. Pushing everyone away, Caroline begins partying to distract from her guilt. Can the team help her recover from her PTSD?
Logan and Caroline's relationship hits a new low when Caroline returns his engagement ring, but things change when a baby is left in Logan's possession. Meanwhile, Cody must overcome yet another setback to his Olympic career.
Matt Brody returns to Baywatch and ends up trapped on a yacht with Neely when a group of ruthless pirates take hostages. Meanwhile, Joey's past may jeopardize her adoption by Mitch.
Logan borrows Cody's car without permission and has an accident, then lies to the police. Meanwhile, the Baywatch team settles an internal dispute with a paintball war and C.J. takes in an injured sea lion, causing problems with her roommates.
Hobie's new friend Isaac is an angry kid who will do anything to get his father's attention. His risky behavior is a problem for the lifeguards. Meanwhile, Caroline meets a jockey who has lost the will to race after an accident.
Stephanie, CJ, and Caroline go on a girls only junior lifeguard trip to Catalina which turns dire when two of the girls get trapped in a flooded cave. Meanwhile, a woman who dies in a car accident bequeaths an odd inheritance to Mitch…
When testing out a new flying machine, Mitch spots a makeshift raft with a stranded woman in it. Mitch must help the Chinese woman find her sister. Back at headquarters, Matt and Garner deal with a beach robbery scam.
Matt and CJ stumble upon a homeless man who shockingly turns out to be someone they know very well. Meanwhile, Mitch must rescue a boy's brother from drug smugglers so the boy can receive a life-saving transplant of his brother's bone marrow.
Andy, an old friend of Mitch, visits Baywatch to complete four days of lifeguard service in order to remain on the active roster. But Andy's strong-arm tactics do not sit well with the other lifeguards.
Mitch receives a mysterious package his father had put together before he died. Mitch and his father never saw eye-to-eye, but this gift impacts Mitch more than he ever thought possible. Logan visits a hypnotist to deal with a past trauma.
Mitch is still mourning Tracy's death, so Hobie seeks help from a radio show to help Mitch recover. Caroline resuscitates a man with AIDS, which puts a strain on her relationship with Logan. And CJ enters a ballroom dancing competition.
Mitch proposes to Tracy, but the happy moment is short-lived as she reveals she has a terminal illness. With the team being short-staffed it is up to Logan and Caroline to deal with reckless wave runners.
Stephanie is kidnapped by an eco-terrorist. The Baywatch team must stop the terrorist before she blows up an oil rig with Stephanie constrained inside it!
When a woman Mitch refers to as “The Mermaid” turns out to be the wife of a crime boss, an FBI agent comes to catch him before he can escape the country. Things become complicated when Mitch and the catty FBI Agent butt heads.
Carter McKay has recently moved to Southern California to live with his father after his mother's death. When Hobie invites him to the annual father/son lifeguard competition Hobie learns the reason Carter is so embarrassed by his father.
Mitch has to work a 24-hour shift with Stephanie and entrusts Hobie with the responsibility of taking care of himself during that time. But Hobie becomes infatuated with an older girl and is pressured into throwing a party without Mitch's knowledge.