Factual error: All the victims were supposedly killed using thalium-201 - a radioactive isotope with a half-life of just 72 hours. e.g.: In the space of two months there would be 10 nanograms for every gram applied to the source of the radiation poisoning (i.e the book) - not enough to make Sid ill without making the perp very ill. He would have had a much higher dose than anyone infected.
Add timeAndy Benham
Factual error: The episode has a character in it called Klaus Braun ("Braun" being the German word for "brown"). However, all of the characters pronounce his surname wrong, saying the "au" like the "or" in "bored", not the proper German pronunciation, which would in fact, be the same as the English meaning, "Brown". Other German character's names were pronounced correctly, and surely Klaus/Abraham would object to having his name pronounced incorrectly.