Original air date: 09/27/2013 Runtime: 43:16 min. After McGarrett and Wo Fat narrowly escape from maximum security, gunmen storm Five-0 headquarters, compromising Kono and Adam's secret location in Hong Kong and forcing McGarrett to break the law and turn on his own in order to find a kidnapped Catherine. Chi McBride and Henry Ian Cusick guest star.
Original air date: 12/13/2013 Runtime: 44:44 min. The attempted murder of a Pearl Harbor veteran leads Five-0 to use decades old evidence to investigate a deadly crime committed within the internment camps on Oahu during World War II. Actual World War II veterans were extras in the filming of a remembrance ceremony at the Battleship Missouri Memorial.
Original air date: 12/20/2013 Runtime: 44:13 min. Chin's life is put in danger when a murder investigation reveals that the person behind the crime may be a serial killer. Meanwhile, Danny and Grace find a mysterious puzzle box washed up on the shores of Oahu. Heather Dubrow guest stars.
Original air date: 03/14/2014 Runtime: 42:58 min. Five-0 aims to uncovers the sordid truth when a girl is taken from her home and her father is shot in the process. Meanwhile, Danny tries to get his parents back together and Jerry deciphers a code he found on the bottom of McGarrett's champ box. Melanie Griffith and Jorge Garcia return and Tom Berenger guest stars.
Original air date: 04/04/2014 Runtime: 44:17 min. Five-0 investigates when the daughter of a macadamia nut tycoon is murdered with a stiletto heel during Chin's high school reunion. Jorge Garcia returns and Rob Corddry guest stars as the fan-voted struggling illusionist. Hawaii Five-0 viewers spent this season voting on key story and production elements for this special episode, including wardrobe, music and even the episode's title.
Original air date: 05/09/2014 Runtime: 43:20 min. When Grover's daughter is kidnapped by an old nemesis, he is forced to help steal $100 million in order to get her back. Meanwhile, Wo Fat escapes prison and heads back to Oahu. Nick Jonas returns as Ian Wright and Mark Dascascos returns as Wo Fat.