Mitch's marriage to Neely falls apart when her ex-husband arrives at Baywatch and they learn the truth about their cruise ship wedding. Flying to New York during a storm, Cody and April's plane crashes during take-off, necessitating a frantic rescue effort in ever-worsening conditions!
Mitch struggles with Neely's lies and the truth about their shipboard wedding. Cody and April race to save survivors of their plane crash. A tragic turn of events puts April in mortal danger when half the plane's fuselage sinks beneath the Pacific.
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.
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.
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.
Cody puts his career, and his life, on the line when he uses a performance-enhancing supplement in hopes of making the Olympic swim team. Alex becomes the object of Mitch's rejection, and Newmie's affection.
When caught up in a high-risk adventure at sea, Craig tells Mitch a shocking secret. Meanwhile, Jessie works to creatively end JD and Cody's rivalry during a beachside triathlon, and April comes clean with Manny.
Mitch feels the need for speed when Tanner's cousin, Damon Lusk, a race car driver in town for a major competition, visits Baywatch. Meanwhile, Newmie and the gang develop a TV show about lifeguards that they try to sell it into syndication.
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.
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.
Alex's search for the creator of several elaborate sand castles on the beach is interrupted when she gets stuck entertaining her best friend's fiancée, who falls madly for Mitch. Cody loses his cool when his new boat is stolen while he's scuba diving with Newmie.