Hawaii Five-O (1968)

S9E17 Dealer's Choice -- Blackmail

A hit-and-run accident uncovers a connection to an underground gambling ring, prompting Five-O to investigate further. As the team delves deeper, they discover ties to Officer Welles's sibling, raising the stakes and complicating the case. Tensions rise as personal loyalties clash with professional duties, forcing Welles to confront a difficult choice while the investigation unfolds.