Frostbite reveals that, besides Danny and Vlad's portals, there are natural entrances into the Ghost Zone. The Bermuda Triangle is one of them.
Frostbite and his people consider Danny the Savior of the Ghost Zone because he defeated the Ghost King in "Reign Storm".
Vlad now has a white cat named Maddie. This alludes to "Maternal Instinct", when Danny jokingly suggested Vlad get a cat to fill the void in his life.
Running Gag: Tucker eats vegetables for the first time in his life (it was to save Danny) and has constant bathroom problems as a result.
Even Though This Episode Premiered In 2007 It Was Made In 2006 According To The Credits