This and The Demon's Quest: Part II (1993) are the only two episodes in the series to take place completely outside of Gotham City.
The episode is based on the comics story from "Detective Comics" #410 (April 1971) titled, "A Vow from the Grave!" written by Denny O'Neil with art by Neal Adams & Dick Giordano. That story did not feature Killer Croc, but Kano Wiggins, a death row escapee.
Killer Croc is quite correct: Crocodiles exert the strongest bite pressure of any member of the animal kingdom.
First appearance of Brad Garrett in the DCAU. He would go on to voice Lobo the bounty hunter and Bibbo Bibbowski on Superman: The Animated Series (1996).
Richard shares his name with King Richard III, the lead character of William Shakespeare's play of the same name. Both Richards are "rudely stamp'd" (i.e., born hunchbacks).