>> who are you? >> bat kid as it turn out is 5-year-old miles scott who has been fighting his own villain, leukemia, since he was 17 months old. six months earlier when gotham city was still san francisco, patrica wilson, ceo of the bay area make-a-wish chapter, got an important call. >> we had a young boy who was diagnosed with leukemia. and his wash was to be batman. and we thought we could turn san francisco into gotham city. i was driving home one night, and i looked at the city and thought it looked gotham-like. >> for help turning the city into gotham, one of the first people patricia reached out to was san francisco chief of police greg suhr. >> when the call came from patricia wilson asking to do something for a little boy -- the answer is always yes,