Tonton Streaming Birds of Prey (2002) S1E12 - Feat of Clay

Citizens of New Gotham are being turned into clay by a villain whose crimes are similar to those of Clayface, the master of shape-shifting who has been in Arkham Asylum for many years. Helena confronts Clayface and learns that his son, Chris, is responsible for the new rash of crimes. She also finds out who was responsible for her mother's murder.