During the July 4th "Ice Villain" attacks seen in the first episode, both Captain Cold and Mr. Freeze, as usual, are depicted as needing technology to produce their freezing effects. They are not meta-humans. In this episode, however, they both wear power-suppression collars which, when deactivated, allow them to generate cold rays from their bodies, just like Icicle Sr. and Jr., and Killer Frost.
Superboy-as-Tommy's neck chain and padlock disappear and reappear between shots when he enters the prison.