Pledge Dredge is an episode of "Taz-Mania".
Mr. Thickley hosts a pledge drive in order to keep Taz-Mania on the air. He shows a handful of scenes from programs worthy of pledge money, and has Bull Gator and Axyle talk to the Platypus brothers about what TV shows they watch. In the end, the program ends up owing money (since the television equipment isn't free). Mr. Thickley is mad that nobody's pledged, but then it turns out that the number that viewers had to call (555-TAZZ) is actually Digeri Dingo's number.