Broyles asks an agent to check a suspects "Metrocard". In the Boston area the stored value cards for mass transit are called Charliecards after the song "Charlie on the MTA".
Bell indicates he gave Olivia a cup of tea with the soul magnets in it on the other side. However, Olivia never took a drink of the tea so, she couldn't have ingested them.
William Bell wrongly uses the word "cognate" to describe a potential host as "able to cognate". Cognate is a noun or adjective for something similar or related. The writer may have tried to derive a verb from the noun "cognition" as a genius like Bell should know the difference.