You will Watch Adventure Time Season 5 Episode 20 online for free episodes with HQ / high quality. Stream cartoons Adventure Time S05E20 Shh! (Princess Bubblegum Is Working Too Hard). Finn and Jake make a bet to see who can not talk the longest, and the two use signs to communicate. However, BMO thinks that the two are possessed by malevolent force and hides in the walls of Finn and Jake’s tree house.