Birds of Prey (2002)

S1E12 Feat of Clay

In New Gotham, people are mysteriously turning into clay due to a villain emulating the notorious Clayface, who has been locked away in Arkham Asylum for years. Helena faces off against Clayface and discovers that his son, Chris, is behind the recent wave of crimes. During this confrontation, she also uncovers the identity of the person responsible for her mother's tragic murder.