• This episode may be inspired from the TV show Get Smart, where the main protagonists Maxwell Smart (Agent 86) and Agent 99 have to protect some precious cargo on a train, while being followed by 2 KAOS agents.
  • Petsburg is a parody of Pittsburgh.
  • Hamtrak is a parody of Amtrak.
  • The Petsburg Flyer is possibly a reference to the American Flyer.
  • This is the second time that Dudley was forced to team up with a villain; the first was Snap Dad.
  • This is the second time the Chameleon is shown without his Molecular Transformation Suit.
  • The Chameleon made a book called The Very Lonely Lizard. It shows how he became a bad guy.
  • This episode is the second time Kitty freaks out due to her cat instincts. She finds a railroad car filled with all sorts of cat toys and goodies, causing her to go crazy.
  • This is the first time that both the Chief and Keswick do not appear.
  • This episode reveals the fact that the Chameleon has a lack of friends.
  • This is the first time the Chameleon mentions poison. The second time was in A Doomed Christmas.
  • The device that Ollie uses to show the pictures of the D.O.O.M. Picnic resembles an iPad, a device made by Apple.
  • This is the second time a character (this time the Chameleon) is shown in pajamas. The first was Kitty in Cruisin' for a Bruisin'.


  • The Chameleon shed his skin and wore underwear, a head brace and a mud mask before going to bed. When he cuddled with Dudley, he had his skin again and was wearing the transformation suit.
  • The Chameleon said he sheds his skin every night, yet near the end of episode he shed his skin during the day.
  • When the Chameleon was holding his bug-infested headgear, he appears to have a glove on his left hand.
  • This is also the first time Kitty ditches Dudley for her own reasons.

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