21 Day Body Turnaround with Michael Mosley (2021)

S1E3 Full Fathom Five

Victor Reese and his spouse Nora are scheming to swindle wealthy widows out of their fortunes. After manipulating them, they poison their victims and dispose of the bodies in the sea. To bring the couple to justice, McGarrett and his team devise a strategy involving a female officer who will go undercover to ensnare the criminals.