The series finale of Fraiser finds Martin and Ronee on the verge of matrimony, and Niles and Daphne preparing for labor. Meanwhile, Frasier prepares for his career in a new city.
Harley recounts how she became involved with the Joker.
After being discharged from Arkham, Harley Quinn tries to lead a normal life but she keeps getting into trouble.
The Joker tries to copyright his smile after developing a chemical that produces bizarre smiles on fish.
A man named Charlie Collins is coerced into playing a role in the Joker's plot to kill Commissioner Gordon.