When at the forensics site, Amelia enters the taped off area to look for clues in her street clothes. This would never happen. She would be dressed appropriately complete with protective clothing and booties. In fact, this mistake has happened in every episode to date. As a matter of fact, in the novels Lincoln demands that Amelia "walk the grid", which is a real search pattern and has not been uttered once so far. These are glaring errors.
Lincoln is snippy and presumptuous when 'Angora' is defined to him. But the definition is incomplete. An assumption is made that Angora is only a type of cat. However, Angora is also commonly known as being, a wool from Angora rabbits, and also a breed of goat (though notably the hair of Angora goats is called mohair).
At the end of the episode when Fred asks William to move his pawn to e4, William actually moves a pawn to d4 instead.