Batman The Long Halloween Part One Movie Clip - Batcave Discussion - Frustration builds as Batman (voiced by Jensen Ackles) attempts to unravel the mystery of the Holiday Killer – with some help from his trusted butler Alfred (Alastair Duncan) in evaluating the probable suspects – in this all-new clip from Batman: The Long Halloween, Part One. Produced by Warner Bros. Animation, DC and Warner Bros. Home Entertainment, the all-new feature-length animated film is available on Digital and Blu-ray.