Main & Recurring Characters of Hawaii Five-0 (2010–2020)

Core Five-0 Task Force

• Steve McGarrett (Alex O'Loughlin) — Ex-Navy SEAL, leader.
• Danny "Danno" Williams (Scott Caan) — Ex-NJ cop, McGarrett's partner.
• Chin Ho Kelly (Daniel Dae Kim) — Ex-HPD, liaison (S1–S7).
• Kono Kalakaua (Grace Park) — Ex-HPD, sniper (S1–S7).
• Dr. Max Bergman (Masi Oka) — Chief Medical Examiner (S1–S7).
• Jerry Ortega (Jorge Garcia) — Conspiracy theorist → analyst (S4–S10).
• Tani Rey (Meaghan Rath) — Ex-beat cop → Five-0 (S8–S10).
• Junior Reigns (Beulah Koale) — Ex-SEAL → Five-0 (S8–S10).

Key Recurring

• Gov. Pat Jameson (Jean Smart) — Mentor.
• Joe White (Terry O'Quinn) — McGarrett's ex-CIA boss.
• Catherine Rollins (Michelle Borth) — Ex-CIA, McGarrett's love.
• Frank Bama (William Baldwin) — Ex-Five-0, friend.
• Dr. Noelani Cunha (Kimee Balmilero) — Forensic pathologist.
• Duke Lukela (Dennis Chun) — HPD veteran.
• Abby Dunn (Julie Benz) — Fed prosecutor, Danny's ex-wife.
• Grace & Charlie Williams — Danny's kids.

Cast evolved over 10 seasons; above are the most prominent.