While in search of underwater treasure, things take a deadly turn when Stephanie and Cody are confronted by a pair of drug smugglers. Back at headquarters, Newman faces off against a different type of treasure hunter…
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.
The team is invited to Hawaii for a week to oversee new lifeguard techniques and relax a bit. Logan becomes obsessed with competing in a surfing competition. To avoid curse, CJ and Stephanie must return a sacred lava rock to its original location.
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…
Mitch's mother arrives in town for a visit, and after some strange occurrences he insists she see a doctor. Meanwhile, Cody loses the motivation to continue his Olympic training and it is up to Stephanie to reinspire him.
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!
Logan's visa is soon to expire, and he will be sent back to Australia unless he gets a green card. He plans on earning the money to purchase one in an upcoming boat race. Meanwhile Mitch's mother visits.