Release Message:  A mouse on the loose in the penthouse makes Peabody (Chris Parnell)'s skin crawl. The inventor of the world's first submarine sets out to find a sea monster.

Description:  Mouse Hunt: Peabody and Sherman have cleaned the penthouse from top to bottom, but a mouse is soon found running about, making Peabody's skin crawl. David Bushnell: Peabody and Sherman join David Bushnell, the inventor of the submarine, on an undersea journey to find a sea monster. Historical Figures: Joseph Lister, Saint Patrick, David Bushnell, George Washington