Now that McGarret is finally back, his mentor Joe White re-emerges and offers to take him to the elusive Shelbourne, met with due suspicion. So Joe must tag along in a case that takes priority, the murder of Honolulu police captain Vincent Fryer. The assailant shoots unsuspecting Max--badly wounding him--and is hit but gets away. A joint case history points to jailed dirty cop Frank Delano, who is questioned about a plausible suspect. A wild car chase leads to H5-0's own HQ, where the assailant gets away after exploding a bomb. Camera footage allows identification now, so the team can track down to the vet whose treatment at gunpoint is cruelly rewarded. Meanwhile, Danny decides to fight his ex's custody of Grace now that she plans to move from Hawai'i with her new husband.
—KGF Vissers