No, he's not a doctor. At the end of BB, they knew he was the one who helped poison the city's water supply.
Posted this in the plot holes thread, but these are more nitpicks and I don't expect a real answer:
1. Batman can pretty much sneak in and out of most places undetected, yet triggers a break-in alarm at Wayne Enterprises? I'm talking about the scene before Fox sees the sonar system, when the secretary informs him that there was a break-in at Wayne electronics. I don't think Batman would do it intentionally, as if he wanted Lucius to come down there, he would have just told him to.
2. How does Joker get bombs into the hospital and ferries without being noticed at all? This took major planning on his part, at least a few days in advance, and I'm sure someone would have noticed someone moving that much explosives into those places.
3. How is Joker the only one not affected by the explosion at MCU when he was standing next to everyone else?
4. If Harvey had flipped the burnt side when he put the gun to his head, how would he have flipped the coin for Gordon?
5. How did Batman get to the top of that tall skyscraper in Hong Kong? He was in his batsuit, so unless he just walked in past security with a bag carrying the suit, without being questioned at all...
6. Why would Alfred ask "How do you say 'Apply your suntan lotion'"? Wouldn't he want to apply the lotion on the girls if they asked?[/quote]
Is..is Alfred gay!!??