Freeze was voiced by Bob Hastings, who voiced Commissioner Gordon. Mark Hamill, who voiced Ferris Boyle here, later made the first of many appearances as the Joker in the DC Animated Universe.
The actor who voiced Freeze, Bob Hastings, also brought Commissioner Gordon to life. Later, Mark Hamill, who portrayed Ferris Boyle in this particular instance, went on to play a significant role as the Joker in multiple DC Animated Universe shows and films.