The Panther in the film is fully computer generated and created through computer graphics. A white cat which was real and snakes were used in the film. No animals were injured while filming, as stated in the end credits.
In the end she is shown confessing to 7 murders. 7th murder is that of her maid [Usha Uthup] who is burnt to death while trying to save Susanna when she burns down the house while trying to commit suicide. '7 Khoon Maaf' means she got away with 7 murders. The story on which the film is based is called 'Susanna's 7 husbands', 7th husband being Jesus Christ when she becomes a nun.