There’s a whole world beneath most cities. Cables and subways and power lines and alligators and waste water tunnels big enough to raft through! Waitaminute –ALLIGATORS?! Join Brad and Clementine on a thrilling Alligator Expedition to solve this mystery once and for all! Check out the PLUM LANDING website for more fun stuff! http://pbskids.org/plumlanding/ Follow us on Twitter! https://twitter.com/PlumLandingPBS Check out our Facebook page: https://www.facebook.com/PlumLandingP... You can also find us on Pinterest: http://www.pinterest.com/pbsparents/p...