In Jervis Bay, off Eastern Australia, researchers recently spotted 15 gloomy octopuses congregating, communicating, dwelling together, and even evicting each other from dens at a site the scientists named “Octlantis.” Anthony and Jeff discuss the reasons and potential dangers of Octopi starting cities. Then, Polish military divers are due to begin a delicate operation on Monday to defuse a massive World War II bomb at the bottom of a channel near the Baltic Sea. The five-ton device -- nicknamed "Tallboy" and also known as an "earthquake bomb" -- was dropped by the Royal Air Force in an attack on a Nazi warship in 1945. Jeff and Anthony run through the process and terrifying possibilities of diffusing a decades old mega bomb.