PHOENIX: (As Joker, singing) When you're laughing. MARTÍNEZ: Now, while they're breaking into song at Arkham Asylum, another Batman adversary is on HBO. The third episode of "The Penguin" airs on ...

Skloff conjured this theme song. It had a power-pop sound that very much fit in with the time of—slightly retro, a touch of the ‘60s, but also modern sounding. Interestingly enough ...

Batman's nemesis has returned to theaters in "Joker: Folie A Deux." And this time, he's got a song in his heart. (SOUNDBITE OF FILM, "JOKER: FOLIE A DEUX") JOAQUIN PHOENIX: (As Joker, singing ...

PHOENIX: (As Joker, singing) When you're laughing. MARTÍNEZ: Now, while they're breaking into song at Arkham Asylum, another Batman adversary is on HBO. The third episode of "The Penguin" airs on ...