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.

Guest star Howie Mandel reveals a major Hollywood secret he's been keeping to Sarah. Afterwards, Sarah hangs out with a bell-hop rabbit, a dog who needs a library card, a daredevil cat, and a dog that has a knack for magic.

Comedian and roast master Jeff Ross brings the heat with a high-speed animal roast. Plus, Sarah meets a dog in some luggage, a high-jumping fox, a puzzle-solving feline, and a parrot with a knack for the pole.

Comedian and Musician Reggie Watts stops by with his pet fish to share a few movie reviews with Sarah. Also, Sarah meets a spider who can understand Yiddish, a painting pig and a dog and his owner who can parkour and flood the set with oohs and "awws."

Sarah confronts rival animal show host Jack McBrayer who is trying to poach the Stupid Pet Tricks wardrobe stylist. Also, Sarah meets goat twins and their twin owners, an acrobat and her trained fancy rats and a cowboy bulldog.

Actor Jon Hamm stops by for a quick visit with his pet turtle, sharing a meal with Sarah. Then, Sarah meets a basketball playing dog, a pig who believes they're a canine, and a heavyweight champion of the world ... Wallaby?

Ranger Jim, played by Will Ferrell, stops by to teach Sarah about animal safety. Plus, Sarah meets an incredible dog who has a tale of perseverance to share, a rockstar duck, a rude horse, and some poodle geniuses.

After learning that the show is overbudget, Sarah is forced to make some difficult layoffs, and Judd Apatow fights for his job; Sarah hangs out with a ninja warrior hamster, a super chill chameleon, a rabbit athlete, and a skateboarding dog.

Sarah's closest rival in the animal show game, Jack McBrayer, takes every opportunity he can to gloat on his success. This time, Jack visits the SPT Offices to show off a very cool jacket he's acquired. Plus, Sarah encounters a classic office problem when she uses the wrong restroom. On stage, Sarah welcomes a variety of stupid and not-so-stupid pet tricks: a dog in search of a world record for a high jump, a horse with a huge talent, a duck artist that can juggle from Brooklyn, and a cat. But which one will win Stupidest Pet Trick of the Week?

In the premiere of Stupid Pet Tricks, 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!