ThunderCats 1985 Season 4 Episode 11 Helpless Laughter Episode Title:Helpless Laughter.Episode Description:A convergence of the Moons of Plun-darr causes a drought on Thundera. Panthro and Snarf go looking for water, then Ezuka – the flying Serpent of Dreary Canal – wanting to get water itself, attacks Panthro and Snarf, causing them to fall into the Swamp of the Laughing Lilypads, and making them laugh uncontrollably. Ezuka attacks the Cats' Lair, still looking for water. Lion-O uses the Sword of Omens to make some rain, and he and Bengali use The ThunderStrike to melt some ice. However, Mumm-Ra comes along and causes a flood.