Episode Title:Danger in the Deep.Episode Description:The teens are enjoying a perfect day at Cross World Dam Lake. Taking a virtual tour of the dam they've been told is polluted, they find a radio signal coming from under the dam itself. Kaitlin discovers a mysterious plank, while J.B. and Ryan encounter Skugs. Ryan dives into the lake and finds a cave, but the door leading into it shuts when he gets close. Back at the newspaper, Kaitlin enlarges the photos and discovers crates labeled "dynamite." Contacting the Professor, the teens figure out Grimlord's plan. They return to the dam to defuse the bomb and are met by the skugs and Shoulderbot. Kaitlin and J.B. take on Shoulderbot, while Ryan finds the bomb, detaches its mooring and hurls it into the water.