My favorite episodes have been mentioned. The Wrong Stuff and The Viper is Coming. I also like the series where Serpentor is created mainly because of Mutt. There is a scene where the principle four joes (Lady Jaye, Scarlett, Duke and Flint) are discussing what Cobra is up to and mention DNA. Mutt and another joe are passing by and the joe asks "DNA?", to which Mutt makes this long explanation of what DNA is and what it's value is. I found it funny because Mutt always comes across as a "hands on" guy and not the scholar.