1. In season one, Doyle sent Angel after a woman being terrorized by a man named Dr. Ronald Meltzer, who could disassemble himself. What was the doctor's specialty?
From Quiz "Angel" Evilies
Answer:
Neurosurgery
Melissa Burns had been treated by the doctor, and then had one drink with him, one time. He became obsessed with her, and stalked her every move. The PTB sent Doyle a vision of her, and Angel offered his services. It turned out that the doctor had become proficient in psychic surgery, and could basically remove his own body parts at will. If they returned to his body in time, no physiological damage occurred. Angel was able to defeat this creepy foe, one of the show's more disturbing baddies, and Melissa became their first paying customer.
Tushka Bergen played Melissa. I think there is no coincidence that the doctor was named "Melt"zer, since he kind of melted apart in a sense. Andy Umberger played Ronald. He also played Anya's boss D'Hoffryn on "Buffy". He appeared on "Bones" in the season five episode "A Night at the Bones Museum".