Continuity mistake: Two-Face's left leg is blue here whereas it was normal in part 1 of his origin episode.
Batman: The Animated Series (1992)
1 continuity mistake in Second Chance - chronological order
Starring: Mark Hamill, Kevin Conroy, Efrem Zimbalist Jr., Loren Lester, Bob Hastings
Genres: Action, Animated, Crime, Drama, Family, Fantasy, Mystery
Factual error: Batman is in Japan and tracks down Kyodai Ken by using Caller ID, which returns a seven-digit "555" number. Telephone numbers in Japan have 8 digits.
Rupert Thorne: All men have something to hide. The brighter the picture, the darker the negative.
More trivia for Batman: The Animated SeriesMore questions & answers from 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.