The series begins with former police officer Steve McGarrett returning to Hawaii after his father's murder. He is determined to find his father's killer. Upon arrival, he is met by Lieutenant Commander Joe White, who informs him that his father was investigating a case involving a powerful crime syndicate. Steve learns that he has been given the authority to lead a special task force, known as Five-0, to combat crime in Hawaii.

Steve recruits Detective Danny "Danno" Williams, a former New Jersey cop who has relocated to Hawaii. Their first case involves the murder of a young woman, which leads them to a drug ring. As they investigate, they discover that the woman was involved with a local gang. Tensions rise between Steve and Danny due to their differing approaches to law enforcement, but they begin to develop a partnership.

The investigation leads them to a confrontation with the gang, where they engage in a high-stakes chase. During the pursuit, they manage to apprehend a key suspect who provides information about the drug operation. This leads them to a warehouse where they find a large stash of drugs and evidence linking the gang to a larger crime syndicate.

As the season progresses, the team expands to include Chin Ho Kelly, a former HPD officer who was wrongfully accused of corruption, and Kono Kalakaua, Chin's cousin and a rookie officer. Together, they tackle various cases, including a kidnapping, a series of murders, and a terrorist threat. Each case reveals more about the characters' backgrounds and personal struggles.

In a significant twist, Steve discovers that his father's murder is connected to a larger conspiracy involving the crime syndicate. He faces numerous challenges, including threats to his life and the lives of his team members. The emotional stakes rise as Steve grapples with his father's legacy and the burden of leadership.

The team uncovers a plot involving a corrupt politician and a drug lord, leading to a climactic showdown. They infiltrate a high-profile event where the drug lord is expected to make an appearance. The operation goes awry, resulting in a tense standoff. Steve and Danny engage in a fierce fight with the drug lord's henchmen, showcasing their combat skills and teamwork.

In the aftermath, the team reflects on their victories and losses. They solidify their bond as a family, vowing to continue their fight against crime in Hawaii. The season ends with a cliffhanger, as Steve receives a mysterious message hinting at further danger related to his father's murder, setting the stage for future conflicts and character development.

In the series finale of Hawaii Five-0, titled "Aloha," the team faces a final showdown against their long-time adversary, Wo Fat. The episode culminates in a dramatic confrontation, leading to significant changes for the main characters as they prepare to say goodbye to each other and their lives in Hawaii.

As the episode begins, the Five-0 team is on high alert after receiving intel about Wo Fat's plans. Steve McGarrett, the leader of the team, is determined to put an end to Wo Fat's reign of terror once and for all. The tension builds as they gather information and prepare for a confrontation that has been years in the making.

In a series of intense scenes, the team works together, showcasing their camaraderie and the deep bonds they have formed over the years. Each member of the team--Steve, Danny, Chin, and Kono--reflects on their journey, the challenges they have faced, and the sacrifices they have made. The emotional weight of their shared experiences is palpable as they gear up for the final battle.

The climax occurs when they finally confront Wo Fat. The showdown is filled with action and suspense, as the team fights to protect their home and each other. In a tense moment, Steve faces Wo Fat directly, and the confrontation is not just physical but also deeply personal, representing the culmination of their long-standing rivalry.

As the dust settles, the team emerges victorious, but not without loss. The emotional toll of their fight is evident as they process the events that have transpired. Each character grapples with their future, contemplating what lies ahead after years of service and sacrifice.

In the final scenes, the team gathers for a heartfelt farewell. Steve decides to stay in Hawaii, continuing his work with the Five-0 task force. Danny, who has been a constant source of support and humor, prepares to leave for a new chapter in his life, but not without expressing his deep bond with Steve. Chin and Kono, who have faced their own challenges, decide to leave Hawaii to start anew together, symbolizing hope and the possibility of a fresh start.

The series concludes with a poignant montage of the characters reflecting on their time together, interspersed with scenes of the beautiful Hawaiian landscape. The final moments capture the essence of family, friendship, and the enduring spirit of the Five-0 team, leaving viewers with a sense of closure and the bittersweet nature of goodbyes.

In summary, the fates of the main characters are as follows: Steve McGarrett remains in Hawaii, continuing his work; Danny Williams prepares to leave for a new adventure; Chin Ho Kelly and Kono Kalakaua decide to leave Hawaii together, seeking a new beginning. The series ends on a note of hope and resilience, encapsulating the journey of the Five-0 team.

Hawaii Five-0, the 2010 reboot of the classic series, does not typically feature post-credit scenes in its episodes. The show generally concludes with a final scene that wraps up the episode's storyline, often leaving viewers with a sense of closure or a teaser for the next episode.

However, there are moments throughout the series where the characters share light-hearted banter or emotional reflections that serve as a sort of epilogue to the main plot. These moments often highlight the camaraderie among the team members, such as Steve McGarrett, Danny Williams, Chin Ho Kelly, and Kono Kalakaua, reinforcing their bonds and the personal stakes involved in their work.

If you are looking for specific episodes or moments that stand out, I can provide detailed summaries of those.

Steve McGarrett's relationship with his father, Henry McGarrett, is a central emotional thread throughout the series. Initially, Steve is driven by a desire to uncover the truth behind his mother's murder, which he believes is tied to his father's past. As the series progresses, their relationship evolves from one of tension and estrangement to understanding and reconciliation. This dynamic is particularly highlighted in episodes like 'Aloha' (Season 1, Episode 1) and 'Olelo Pa'a' (Season 5, Episode 25), where Steve grapples with his father's choices and the impact they have on his own life.

Danny Williams' relationship with his daughter, Grace, is a pivotal aspect of his character development. Throughout the series, Danny struggles with the challenges of co-parenting after his divorce, which often leads to emotional conflicts and moments of vulnerability. His protective nature and deep love for Grace are showcased in episodes like 'Ohana' (Season 1, Episode 2) and 'Kāua' (Season 5, Episode 24), where he goes to great lengths to ensure her safety and happiness, revealing his softer side amidst his tough exterior.

Kono Kalakaua serves as a vital member of the Five-0 team, bringing a unique blend of strength, intuition, and loyalty. Her character is introduced as a rookie cop with a strong sense of justice, and her journey includes overcoming personal challenges, such as her struggles with the law and her relationship with Adam Noshimuri. Episodes like 'Kāua' (Season 5, Episode 24) highlight her dedication to the team and her ability to balance her personal life with her professional responsibilities, showcasing her growth from a rookie to a seasoned investigator.

The formation of the Five-0 task force is catalyzed by the murder of Steve McGarrett's father, which prompts Steve to return to Hawaii. In the pilot episode, 'Aloha' (Season 1, Episode 1), Governor Pat Jameson offers Steve the opportunity to lead a special task force to combat crime in Hawaii, allowing him to investigate his father's death. This pivotal moment sets the stage for the series, as Steve recruits Danny Williams, Chin Ho Kelly, and Kono Kalakaua, each bringing their unique skills and backgrounds to the team.

Chin Ho Kelly's character undergoes significant evolution throughout the series, marked by his struggles with loyalty, redemption, and family. Initially introduced as a disgraced former cop, Chin grapples with the stigma of his past while striving to prove his worth to the Five-0 team. His journey is particularly highlighted in episodes like 'Kāua' (Season 5, Episode 24), where he confronts his family's criminal ties and seeks to protect his loved ones. Chin's deep sense of honor and commitment to his team ultimately leads him to become a respected leader within the task force.

Hawaii Five-0, while an engaging and action-packed series, does contain several elements that may be considered objectionable or upsetting for children or sensitive viewers. Here are some aspects to be aware of:

1. Violence: The show features frequent scenes of gunfights, physical confrontations, and other forms of violence. Characters often face life-threatening situations, and there are depictions of injuries and blood.

2. Crime and Criminal Activity: The series revolves around a police task force tackling serious crimes, including murder, drug trafficking, and human trafficking. The portrayal of these activities can be intense and may be disturbing.

3. Death and Loss: Characters experience loss, and there are emotional scenes related to the death of loved ones, which can be heavy and impactful.

4. Language: There are instances of strong language and profanity throughout the series, which may not be suitable for younger audiences.

5. Mature Themes: The show touches on themes such as betrayal, corruption, and moral ambiguity, which may be complex for younger viewers to understand.

6. Romantic Relationships: There are subplots involving romantic relationships that may include suggestive content or adult themes.

7. Emotional Turmoil: Characters often deal with personal struggles, trauma, and emotional conflicts, which can be intense and may resonate deeply with sensitive viewers.

Overall, while Hawaii Five-0 offers thrilling storytelling and character development, it may not be suitable for all children or sensitive individuals due to its mature content. Viewer discretion is advised.