Topping last night's terrific episode will be a tall order, but when a champion swimmer and Olympic hopeful is found dead in a training pool, Castle may be up to the task.

The title character and Beckett dive in (so to speak) to "The Dead Pool" and investigate his murder, uncovering myriad secrets that might have led to his strange death.

Also in next Monday's installment, crime fiction authors Michael Connelly and Dennis Lehane guest star, offering Castle their insights into the case over a game of poker.

Check out a sneak peek from the episode here:

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.