While Mozzie describes the titular coin as an Islamic Dinar from the Abbasid dynasty, the coin shown is actually an Achaemenid coin depicting Darius the great. The Achaemenid coin shown actually predates the Abbasid dynasty by over a thousand years.
First mention of the last name Mitchell. Elizabeth's friend married a guy with that last name. In other episodes it is Elizabeth's maiden name and later it is also listed as Sarah Ellis mothers maiden name as well.
While, Caffrey's correction of Aimes' comment about the Greeks ending Ptolemaic rule is partially correct in that it was in fact ended by the Romans, the ruler he mentioned was Ptolemy I Soter (367 BCE - 283 BCE), the founder of the Ptolemaic dynasty. The death he assigns the end of the dynasty to is factually correct, Cleopatra VII (69 BCE - 12 August 30 BCE). Her co-ruler at the time was did not have 'Soter' in his name: Ptolemy XV Philopator Philometor or 'Caesarion;' although he did die on the same date (12 August 30 BCE). It is possible (but confusing) that Caffrey was referring to the entire dynasty as Soter's reign, explaining his mention of the name.