The DC3cast goes underwater in episode 492.

The DC3cast, Episode 493: All-In Check-In - 'We Are Yesterday'

The DC3cast is a lively discussion about DC Comics, hosted by three Multiversity Comics (multiversitycomics.com) staffers - columnists Vince Ostrowski and Zach Wilkerson and editor Brian Salvatore.  Discussions, interviews, reviews, games, and more can all be found on the DC3cast.