Geils goes undercover as a lifeguard after a string of suspicious drownings, but Tribeca is worried that he’s getting in too deep.

A murder scene complete with lots of blood but no victim and high tech life-extension science are all part of the investigation as Castle and Beckett try to solve a…

Alan tries to find out what Lyndsey’s boyfriend has over him; Walden helps Jenny pursue her acting career.

Alan tries to find out what Lyndsey’s boyfriend has over him; Walden helps Jenny pursue her acting career.

Franks Fluids LLC is in big trouble after a news segment. Dee and Dennis help with the PR nightmare and Charlie and Mac work on a scheme to make Fight…