A teenage girl, maybe 15 or so, buys a .38 handgun from a junkie. Also present at the sale is an old friend of Junior’s, who clearly feels uncomfortable – you’d think, wouldn’t you? – and tells the Five-0, who are immediately on alert for someone to be killed. And, sure enough, the next day one Michael Carrigan is found dead, having been shot with a .38.
As the Five-0 try to find the girl, then the motive, then solve the case, the present-day action is interspersed with flashbacks to other crimes: Steve’s father and Duke being shot in 1983; a holdup in a convenience store in 2010, the day before Danny started with the Five-0; and an incident in 2015 which finally persuaded Tani that she needed to disentangle herself from her criminal associates. The same gun, of course, was involved in all of these incidents – and quite a few others, it’s a “community gun”, a phrase which is new to me – and once the Five-0 finally have their hands on it they can start to solve quite a few cold cases.
It’s a smart, fast-moving episode. It would be easy to think that the Five-0 writers’ room can turn out episodes like this between slices of pizza, but I rather suspect that would understate the craft and industry involved.