Didn't the doctor burst into a cloud of bugs when they tried to cart him off?
Ok, this can get confusing because *all* the characters in the story are titled doctor. So, here's a brief outline:
*MAJOR SPOILERS*
- Dr. Norman Terriault (the physticist) was really a cloud of bugs.
- Dr. Singh (the guy who did most of the interrogation) was set up by the narrator.
- Dr. Jason Spinrest (the head of the anti-mimic unit) was being mimicked, then eaten, by the narrator.