• The name of this episode is a pun on the word "underdog", or a reference to ThunderCats franchise, or a reference to the Underdog cartoon.
  • The concept of the weapon "Thunder Bird" was possibly inspired from the TV show Get Smart, in the episode Supersonic Boom, where the antagonists, KAOS, had a sonic weapon able to create earthquakes.
  • In this episode, Kitty wears a collar, however this is the only episode where she is seen wearing it.
  • Items Dudley was chained to: a giant ship's anchor, an aircraft carrier, and a space shuttle.
  • Injuries caused by Dudley: 12 (Himself five times, Kitty four times, and Bird Brain three times)
  • There is a spoof of Dunkin' Donuts called Dumpin Donuts. This was seen before in Snapnapped.
  • Bird Brain has an aunt named Aunt Lulu who moved to Mexico.
  • Dudley saying "I'm still stuck on the word Boobamunga." It may be a sexual joke, as "boob" is a term for "breast".
  • Rancho Boobamunga is a parody of Rancho Cucamonga.
  • Apparently, Kitty has started getting gray hair since Dudley joined her team.
  • This episode is before Snap Dad, but Nickelodeon aired that before this episode due to a Valentine's Day event.
  • The spelling of Korn on the Korn Nuts bag is simply sort of based on a nu metal band, also called Korn. It could also be a play on the snack food Corn Nuts.
  • This episode was nominated for an Annie Award.

Running Gags

  • Bird Brain's new henchmen saying "Who?" and "Where?".
  • The Chief freaking out over small robberies done by Bird Brain.
  • Keswick jumping into the incinerator chute instead of the laundry chute.
  • Dudley chaining himself onto large and heavy objects.
  • Dudley using the adjective "brave guy" when he puts on the collar.


  • In the T.U.F.F. jail cell, Bird Brain says "Who, what, where." But who, where, and why were the actual sayings.
  • In the T.U.F.F. jail cell, Bird Brain lays an egg, yet he's a male bird, which is similar to how male cows are able to be milked in Back at the Barnyard.
  • AT&T U-Verse says that Dudley has a fear of lightning, but he actually has a fear of thunder.
  • Keswick has a fear of girls, but in other episodes, he interacts with girls and isn't afraid of them.
  • In a scene or two, Kitty's headband changes color.
  • In the first shot, Dudley already has his medal on, despite getting it a few shots later.
  • When Keswick yells by being interacted by a girl at the end, his left arm is not seen.
  • Kitty says here that she is afraid of shedding in public, however, in the episode Hot Dog she shaves in front of Dudley and faces the Chameleon in that look without any problem, considering she was technically naked.
  • When Bird Brain announces his plan to all the citizens that he's going to destroy Petropolis and have them move into his condos, the wire on his microphone isn't connected.
  • This is the second time we see Tammy, but her appearance changed.

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