Original air date: 09/24/2012 Runtime: 43:42 min. Following McGarrett's mother's (Christine Lahti) surprise return and Chin's gut-wrenching decision in last season's finale cliffhanger, the team is determined to track down Wo Fat and Delano for killing an important member of their family.
Original air date: 11/12/2012 Runtime: 43:46 min. When Danny is forced to remain completely still while bomb technicians disarm a bomb that he has accidentally activated, McGarrett distracts him by getting his partner to tell the story about his toughest and most emotional case from his days as a cop in New Jersey. Sydney Tamiia Poitier, Terrence Howard, rapper T.I., and Kendall Jenner guest star.
Original air date: 11/26/2012 Runtime: 43:47 min. McGarrett plays cat and mouse with a smart and seductive therapist he believes murdered her patient. Meanwhile, Catherine must hunt down one of Doris's old targets who is now seeking revenge. Vanessa Marcil and Carlos Bernard guest star.
Original air date: 12/03/2012 Runtime: 43:45 min. Max and his crush get put in harm's way when a botched bank robbery leads the team to determine that the criminals had very unexpected motives. Meanwhile, Danny is stuck with the tough task of coming to the rescue of the most beautiful women in the world when a stalker goes after a Victoria's Secret model. Victoria's Secret Model Behati Prinsloo, Rumer Willis and C. Thomas Howell guest star.
Original air date: 12/10/2012 Runtime: 42:37 min. An Aloha Girls camping trip with Grace turns deadly when an armed man takes McGarrett and a little girl hostage. Meanwhile, Adam introduces Kono to his dangerous brother who was recently released from prison. Tom Arnold guest stars.
Original air date: 02/11/2013 Runtime: 43:43 min. Five-0 investigates the murder of a Lua master, and McGarrett hires a private investigator to follow his mother. Christine Lahti returns as Doris McGarrett, Treat Williams guest stars as Mick Logan, and Summer Glau guest stars as Maggie Hoapili.
Original air date: 02/18/2013 Runtime: 43:39 min. It's an All-Pro football weekend in Hawaii and while Danny obsesses about the big game, Five-0 investigates the murder of a tech executive with the help of a star football player. Arian Foster, Pat Monahan, and Larry Manetti guest star.
Original air date: 03/18/2013 Runtime: 42:58 min. When a murder victim falls where Dog The Bounty Hunter is apprehending a suspect, Five-0 sends Catherine in undercover at the local roller derby to find the culprit. Bounty Hunter Duane "Dog" Chapman and his wife Beth Chapman guest star.
Original air date: 03/25/2013 Runtime: 43:12 min. When threats turn deadly against a tour company that endangers the local shark population, Five-0 faces the difficult task of narrowing down the suspect list. Meanwhile, the team debates whether or not Kamekona will earn his helicopter license.
Original air date: 05/06/2013 Runtime: 43:44 min. When the body of a young girl who was kidnapped 10 years earlier is discovered, Five-0 must hunt down the kidnappers who have now taken their next victim. Meanwhile, Kono asks Catherine for a favor that could damage her relationship with Adam. Mare Winnigham and Henry Rollins guest star.
Original air date: 05/13/2013 Runtime: 43:46 min. McGarrett must help his mother execute a covert op to retrieve an incriminating microfiche. Meanwhile, Kono's life is in danger when she closes in on Adam's secret. Treat Williams, Christine Lahti, Anthony Ian Dale and Daniel Henney return in this episode and guest stars Craig T. Nelson.
Original air date: 05/20/2013 Runtime: 43:43 min. As the CIA tasks Five-0 with finding a dangerous killer loose on the island, Kono goes on the run for a murder she did not commit. Meanwhile, McGarrett's prison visit to Wo Fat ends with a shocking discovery. Christine Lahti, Ian Anthony Dale, Daniel Henney and Autumn Reeser guest star.