Alex tries to save a diamond smuggler whose partners want him to "sleep with the fishes." Neely makes Hobie a tempting offer that divides the Buchannon household.
Cody learns a lesson in love when he and Mitch help a troubled violinist escape her dangerously overbearing mentor with a secret agenda. Meanwhile, Alex sets out to prove her worth at Baywatch by retaking the grueling rookie test with Jessie.
While team Baywatch prepares to compete against the Australian guards, Jake must choose between staying down under with his son or returning home. The competing lifeguards must put their intense rivalry aside to save a life.
After Mitch's lifeguard buddy's ex-wife dies in Australia, Mitch and the team accompany him on a trip down under to meet the son he's never known.
A young, hearing-impaired girl learns a lesson in friendship when she, Mitch and Alex protect an orangutan, while Cody and Jessie deal with its abusive owner.
Upset about his failed marriage to Neely, Mitch goes for a day-long tower swim along the beach and encounters problems that distract from his own, including April and Craig's May/December romance, and reluctant heroes Cody and JD.
Mitch befriends a boy who joins junior lifeguards in hopes of escaping a brutal home life. Jessie makes a passionate play for JD. Alex auditions for “Jeopardy!”
Hobie struggles with his irresponsible actions leading to a boating accident that leaves a girl in a coma. Jessie is gripped with fear after April tells her of a recent, job-related tragedy.
April suffers PTSD after losing a rescue victim. Mitch and the victim's widow refuse to give up searching for his body. Jessie runs into an old beau who could undermine her future at Baywatch.
A mysterious lifeguard makes rescues around Baywatch, then vanishes. After going over Mitch's head one too many times, Alex gets an annoying new partner.
Cody accompanies Alex on a vacation to Hawaii where she wants to take her autistic 10-year-old nephew, Timmy, to swim with dolphin in the local lagoon. Cody spends quality time with Lani's sister, Callie, a local Hawaiian lifeguard.
Captain Alexis "Alex" Ryker, the conniving CEO of a private lifeguard company, wants to take over Baywatch to expand her private lifeguarding empire. Mitch suspects Alex of setting up fake rescues and recruits Cody to spy on the BayGuard team.
After a swimmer shows symptoms of a deadly virus, headquarters is quarantined, trapping Mitch, April, Donna and JD inside with an annoying salesman. With JD waylaid, Newman takes on his plum assignment overseeing a photo shoot of sexy models.
Cody makes a crazy bet with some local hotshots. Mitch risks his uncle's new Scarab in a wild race. Meanwhile, Neely and her baby daughter Ashley move in with Mitch for a couple of days sparking a twist to their relationship.
Garner enlists Mitch's help to track down and capture a ring of drug smugglers operating from a boat offshore. The stakes get deadly when Neely goes undercover to plant a bug and her cover is blown! Lani struggles to come to terms with her deafness.
Mitch uses Hobie to initiate a relationship with Hobie's horseback riding instructor. Cody, JD, and Lani try to make extra cash in a scheme to collect Sea Urchins, but when another diver gets into trouble, Lani puts her life at risk to save him.
After breaking up with Manny, April finds romance with Craig, who is having a mid-life crisis. While working together to catch a trio of wild men on waverunners harassing swimmers, Craig and April's passion heats up.
Mitch learns that a cache of US Marine weapons has been stolen and probably hidden offshore. Mitch and Cody locate a sunken vessel with the arms on board, but before they can confiscate them, they are taken captive.
Prejudice threatens Manny and April's relationship, driving April into Craig's comforting arms. An encounter with sharks leads Craig and April to take shelter in a water treatment plant's intake pipe where they encounter even more danger!
Caroline's truck is hijacked by a young thief who forces her to drive him on a wild getaway chase. Neely reveals a shocking secret about her outrageous actions during her hiatus from Baywatch.