They later find he is targeting a couple, who recently won a million dollars and free trip to Hawaii on a game show.

Meanwhile, McGarrett reunites with his sister Mary (Taryn Manning) when she comes to visit and asks his on-again, off-again girlfriend Navy Intelligence Officer Catherine Rollins for "a favor" in watching over her.

McGarrett awakens to masked men breaking into his house and stealing the Champ box containing the investigation into his mother's murder.

They later raid a gambling den and find the third assailant, Hiro Noshimuri, believed to be involved in not only the kidnapping but McGarrett's mother's death.

[33] The series premiered on September 20, 2010, and after five episodes aired, CBS gave the show a full season order on October 21.

[3][34] The first season was executive produced by the three co-creators Alex Kurtzman, Roberto Orci and Peter M. Lenkov, with the latter serving as head writer and day-to-day showrunner.

The remaining eight episodes were directed by Paul Edwards, Alex Zakrzewski, James Whitmore, Jr., Elodie Keene, Frederick E. O. Toye, Eric Laneuville, Larry Teng and Steve Boyum.

[37][38] Daniel Dae Kim was the first to be cast in the series on February 8, 2010, to play Chin Ho Kelly, an ex-cop trained by Steve McGarrett's father.

[47] Manning's third and final episode as a main cast member was "Ke Kinohi" but she makes guest appearances in subsequent seasons.

[45] On September 3, 2010, it was reported that Jean Smart had been cast as Governor Pat Jameson[48] Masi Oka appeared as guest star playing the chief medical examiner Max Bergman.

[51] Larisa Oleynik was cast in a recurring role, as ex-CIA analyst Jenna Kaye, with the option to become a series regular in the second season.

[54] One week later, the season began airing on television on September 20, in the 10 p.m. (ET) timeslot on Mondays,[55] on the 42nd anniversary the original show premiered.

Shaffer stated that although it was not "particularly refreshing," the season was "damn good, with great cinematography, solid performances and slick, stylized action and drama.

"[64] Dave Trumbore of Collider stated "The new Five-O plays like an action-packed combination of The A-Team's antics with the realism of The Shield.

Though season one doesn't choose to go nearly as dark as many episodes of The Shield did, Alex O'Loughlin brings his physical presence and stunt training from that series into Five-O."

"[65] Stuart Galbraith of DVD Talk had "many criticisms" with the season, but liked some aspects of the show because "clearly there's an attempt to draw from the best elements of the original series.

[68] A ratings low came with the penultimate episode, "Ua Hiki Mai Kapalena Pau", which earned 9.45 million viewers.