Jeremy Renner and Edie Falco chat exclusively with USA TODAY on the set of "Mayor of Kingstown" while filming Season 4, out Oct. 26 on Paramount+.

In this underwater metal detecting adventure, I discovered two pistols in the river while using my underwater metal detector.

We thought we’d found another Civil War site. Turns out, we might’ve found… something else. Either way, it’s one more reason to never trust your metal detector’s “common item” signal.