Season 1 | Episode 1 Archer is in trouble with his Mother and the Comptroller because his expense account is way out of proportion to his actual expenses. So he creates the idea that a Mole has breached ISIS and he needs to get into the mainframe to hunt him down (so he can cover his tracks!). All this leads to a surprising ending.
Season 1 | Episode 2 Lana's residual lust for Archer prompts Malory to promote Cyril to field agent. Archer then trains his new competition as only he can, whilst Malory frets over her own past and her son's future.
Season 1 | Episode 3 Owing to a rash of agent deaths (the result of Sterling's carelessness), ISIS can't meet government diversity standards. Enter the gruffly elegant Conway Stern, an "onyx" agent who wears a Star of David around his neck. Conway is "a diversity double whammy," gushes Malory, but that and his secret-agent skills aren't the only reasons she hired him.
Season 1 | Episode 4 Malory hosts a dinner party for the UN intelligence chairman, Torvald Utne, in an effort to get a new weapons contract for ISIS. Unfortunately, a group of rival assassins have targeted Mr. Utne for elimination.
Season 1 | Episode 5 Malory's career is threatened when a sensitive videotape falls into the hands of a rogue (and roguish) Cuban agent, so she calls on Archer’s expertise in seduction to turn the tables on her blackmailer.
Season 1 | Episode 6 Archer must rescue Lana from the clutches of Skorpio, the infamous arms dealer. Meanwhile, Cyril fears not only for his girlfriend's life, but her succumbing to the seductive nature of Archer's heroics.
Season 1 | Episode 7 When a bomb threat jeopardizes the maiden voyage of the luxury airship Excelsior, Archer and the ISIS crew must battle the clock (and each other) to avert disaster.
Season 1 | Episode 8 After ISIS loses yet another lucrative contract to rival agency ODIN, Malory assigns Archer and Lana to embarrass ODIN by stealing a priceless diamond from their biggest client.
Season 1 | Episode 10 Questions about the identity of Archer's real father lead him into a perilous trap... and an explosive confrontation with Malory.
Elsa, Anna, Kristoff and Olaf head far into the forest to learn the truth about an ancient mystery of their kingdom.
Season 1 | Episode 1 Steve McGarrett is summoned home to the island of Honolulu to bury his father after he is murdered by a madman. Governor Jameson wants Steve to head up a new elite police unit and she will give him full authority to get the job done. Initially he turns down the job, but when he meets the man in charge of the unit, he changes his mind.
Season 1 | Episode 2 Following the abduction of a former NSA cyberterrorism expert, the team must rescue the man and prevent a breach of national security.
Season 1 | Episode 4 A violent convict escapes from prison and kidnaps a young couple on vacation; McGarrett's estranged sister comes to town.
Season 1 | Episode 3 An escalating gang war spills into the stands of a high-school football game, killing several people; an unlikely partnership arises.
Season 1 | Episode 5 When the daughter of the U.S. ambassador to the Philippines is found dead, the governor tasks Five-0 with finding her abducted sister.
Season 1 | Episode 7 When a Navy SEAL, who's on the run for a murder he swears he didn't commit, takes hostages and safe haven aboard the U.S.S. Missouri memorial battleship, McGarrett must use every SEAL skill in his arsenal to diffuse the situation.
Season 1 | Episode 6 When the CEO of a successful surf company is murdered, Kono revisits her past; Five-0 is thrown into the varied but interconnected worlds of North Shore surfing.
Season 1 | Episode 8 When Danny's ex-partner is found dead at a Hawaiian luau the Five-0 team's investigation leads them to some dirty cops and a powerful cocaine cartel.
Season 1 | Episode 9 When a member of the security detail for an upcoming Aid Summit is murdered before he can reveal the details of an assassination plot, Five-0 is brought in to investigate the murder and protect the target, a ruthless dictator.
Season 1 | Episode 10 Five-0 is baffled when a highly skilled ring of thieves pulls off a heist of an armored car, killing two security guards but leaving the money behind. Their only lead in the case requires Danny to reluctantly ask his ex-wife for a favor.
Season 1 | Episode 12 It's Christmas in Hawaii, but instead of celebrating, Five-0 is negotiating a hostage situation when the man who killed McGarrett's father resurfaces. The murderer, Victor Hesse, threatens to detonate an explosive that he's strapped to Chin Ho's chest.
Season 1 | Episode 11 The wife of a newlywed couple is found disoriented with amnesia in Kahana State Park with the husband currently missing. The mother of the husband suspects the wife for staging the whole thing although Five-0 & M.E. Bergman may have discovered a potential newlywed serial killer.
Season 1 | Episode 13 McGarrett discovers new clues in his mother's murder when his sister is kidnapped.
Season 1 | Episode 15 Five-0 struggles to stay a step ahead of a major tsunami that has the island evacuating its shores as they investigate the disappearance of the head of the Tsunami Warning Center.
Season 1 | Episode 14 After a high-speed chase, the team makes a gruesome discovery; Chin Ho and his ex-fiancee are awkwardly reunited.
Season 1 | Episode 16 When the sole witness in a high-profile murder case disappears, Five-0 must head into the jungle to locate and protect her from assassins who are closing in fast.
Season 1 | Episode 18 While Five-0 races to stop a mad bomber before he kills again, Danny gets an unexpected visit from his little brother, Matt, a fun-loving, Wall Street broker. The family reunion is cut short, however, when Danny discovers the real reason that Matt is in Hawaii.
Season 1 | Episode 17 Five-0 is first on the scene when a pirate attack turns an afternoon pleasure cruise into a kidnap-and-ransom nightmare for a group of wealthy spring breakers.
Season 1 | Episode 19 Five-0 combs a convention to find the killer of a sci-fi fan who was thrown out of a high-rise window. A CIA agent who's interested in the Yakuza that killed McGarrett's parents shows up in town to meet with Steve.
Season 1 | Episode 21 When a crime lord moves against the family of an undercover NYPD detective who infiltrated his organization, it's up to Five-0 to stop the policeman from exacting revenge.