McGarrett thinks a smart, seductive therapist (Vanessa Marcil) murdered one of her patients; one of Doris' former targets seeks revenge.
Sipowicz responds to a shootout between police and a Mafia man.
Detectives investigate a man's beating at the hands of hired thugs; a woman reports her husband missing; testimony at Fraker's trial threatens Rodriguez's career.
The team searches for a trial consultant who goes missing during a big civil case; Jack and Samantha adjust to Brian spending time with Finn.
The team looks for a billionaire's son who disappears after his plane crashes.