David Letterman passes Sarah Silverman the Stupid Pet Tricks torch and shares with her a very special Top Ten List. Also, Sarah meets the SPT staff and smooths out some unexpected intra-office issues. On stage, Sarah welcomes a former rodeo clown and his shockingly agile best friend, a goat who can walk on two legs, a party animal that really knows how to get down, and a dog that's up there with the smartest animals in the world. But only one will take home the title of Stupidest Pet Trick of the Week!

David Letterman takes Sarah on an expensive stroll down memory lane. Then, back on stage, Sarah welcomes a brilliant roller-skating parrot, an acrobatic dog, a cat who can drive a car, and a bunch of racing roaches.