Bruce's one line, "So stop them", is the shortest that Kevin Conroy has recorded for a single episode in the whole DCAU.
The skeleton in the mine still has a scrap of purple suit and flower on it. As this was before the creative team had conceived of the story for "Return of the Joker", it could be surmised that this an allusion to the final fate of the Joker. Alternatively, it could simply be one of the other initiates who did not survive, but the individual in this episode is wearing regular clothes as opposed to entering the initiation in Joker garb.
Though Scab is first seen in the episode "Rebirth, Part I", this is the first time he's been named.
When Dr. Price orders her crew to leave the vessel, the crew informed her the fuel temperature is 280. It's never specified as to what unit of measure they're using. Regardless of whether it's measured in degrees Kelvin, Celsius or Fahrenheit, 280 degrees is considerably less than standard operating temperature for real world nuclear reactors. Real world nuclear reactors can operate at temperatures exceeding 700 degrees Celsius (1,292 degrees Fahrenheit).
First appearance of the Jokerz rival gang the T's