Ep 1. Ka 'owili 'oka'i (Cocoon)

In the season 9 premiere of Hawaii Five-0, titled "Ka 'owili 'oka'i" (Cocoon), the team is called to investigate a murder at a luxury resort. The victim is a wealthy businessman who was found dead in his hotel room, but the circumstances surrounding his death are mysterious. While investigating, the team discovers that the victim was not the only one who was staying at the resort - there are several guests who all seem to be hiding something.

As the team digs deeper, they realize that the case is connected to a larger criminal operation on the island. Meanwhile, McGarrett and Danny are dealing with personal issues - McGarrett is trying to find a way to propose to his girlfriend, while Danny is struggling to cope with the recent loss of his brother. Despite these distractions, the team is determined to solve the case.

Throughout the episode, viewers are treated to the usual blend of action, drama, and humor that have made Hawaii Five-0 a fan favorite. There are car chases, shootouts, and plenty of witty one-liners. In addition, the show explores some of the personal relationships between the characters - in particular, the growing romance between Tani and Junior.

Overall, "Ka 'owili 'oka'i" is a strong start to the ninth season of Hawaii Five-0. The episode sets up several intriguing storylines that are sure to keep viewers hooked throughout the season. Whether you're a longtime fan or a newcomer to the show, this episode is definitely worth checking out.