Haley Cook

Five-0 and an ATF agent from California team up when a serial arsonist targets couples in Oahu, and Amber's abusive ex tracks her down while she is on a romantic getaway with Danny.

Desmond wakes up and finds to his horror that Charles Widmore has taken him back to the island. He attacks Widmore, who tells him the island is not finished with him yet, and that if Desmond does not help him, all the people he cares about will die.

A supposed suicide puts the wedding guests and the locals on edge; Trish must make a decision about Hunter.