Capgras Syndrome is a wonderful example of why we should be understanding to others and stop the stigma surrounding mental illness. Brain injury can have truly unexpected consequences.
Inspiration for this animation:
When a 'Duplicate' Family Moves In by Carol W. Berman, M.D. in The New York Times
Seeing Imposters: When Loved Ones Suddenly Aren't by Jad Abumrad and Robert Krulwich on Radiolab
Capgras syndrome: a novel probe for understanding the neural representation of the identity and familiarity of persons. Hirstein W and Ramachandran VS. Proceedings of the Royal Society B: Biological Sciences.
For information about mental illness: