When Ashleys cell phone rings it says blocked number. But she was able to call back the number that called her. In realty this would not be possible since the number was blocked she would not know the number. ... The call from the blocked number was made while the Doctor was sitting with her, therefore it couldn't have come from him. Since he stated he had previously contacted her via phone, she probably had his number from then.
When Parker is punching in the six-digit code to open the door, there are seven beeps.
About half way through, aerial flyover shot of downtown area of city is of Mobile, AL, not purported location of series.
Hardison says that several countries around the world house the smallpox virus, when in reality, there are only two places that have it: the CDC in Atlanta and a facility in Russia.