First up - let me say that I know I am way behind in reviews - I do plan to catch up, maybe with a multi-ep review.
McGarrett's little sis (Mary Ann) has been kidnapped and it ties back into the Champ case left to McGarrett with his dad's last few words. Corruption goes very high in Hawaii it seems. Motorcycles, the Yakuza and golf.
Good use of tension.
The ep wasn't all about getting Mary Ann back.
McGarrett goes all Ninja-Seal for the episode.
Nice background development on McGarrett.
Danny still has the best lines.
There was actually some acting this week.
Solved the recent mystery of McGarrett's mum's murder.
Opened new mini-arcs for team to solve instead of case of the week.
A bike up the stairs into a building with Yakuza who would all be packing guns? Sure.
Let's kidnap you but leave you your phone.
Not much Chin or Kono.
Just how many international crime syndicates operate in Hawaii?
Shoot out on the beach.
People relaxing on the beach not 20m from uncovered dead body while police work on it.
This episode had all the things I love about Hawaii Five-0 plus all the things I love to being so bad - bad policing, stupid plot devices, obvious twists and turns, the twee use of island language or terms, and insanely beautiful panoramic shots. For all its faults, they are ones within the "Hawaii Five-0 Believability Universe" so it is OK.
Oh - I forgot to say that this episode's title "Ke Kinohi" means a new beginning, which tied in very nicely to the episode.