- as Lt. Commander Steven J. „Steve“ McGarrett
- as Danny Williams
- as Tani Rey
- as Adam Noshimuri
- as Lou Grover
- as Junior Reigns
- as Quinn Liu
- as Dr. Noelani Cunha
- as Wo Fat
- as Victor Hesse
- as Lincoln Cole
- as Daiyu Mei
- as John McGarrett (Archive footage)
- as Lead Doctor
- as Catherine Rollins
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