Batman: The Animated Series
Upvote valid corrections to help move entries into the corrections section.

Suggested correction: A plot hole is when there is a logical inconsistency that benefits a story despite not making any sense. Something not being explained is not a plot hole. And the reason Batman interrupts the procedure is because Clayface is a criminal who has committed numerous robberies as of late, and Batman is there to apprehend him. As far as Batman is concerned, if Clayface wants to undergo the procedure, then he must do it while in custody.

Phaneron

More quotes from Batman: The Animated Series

Two-Face (1) - S1-E17

Trivia: Harvey Dent's demanding of a mirror to see his scarred visage at his doctor's reluctance is very similar to the Joker demanding a mirror from his surgeon in the 1989 "Batman" film. (00:20:30)

Phaneron

More trivia for Batman: The Animated Series

Answer: Because he stole a chemical from his lab.

But Batman knew that with it, Clayface could permanently retain his shape and Clayface desperately wanted to be Matt Hagen again. In a sense, Batman stopped Clayface from becoming human.

More questions & answers from Batman: The Animated Series