Detective Ryan states that the victim, Michael Bailey, is 28 but Bailey's driver's license says he was born in 1978 and his license was issued in 2008 which would make him at least 30 by the time it was issued.
While looking through the book of women the victim slept with, Castle closes the book. Then in some shots the book is still open in his hands, while in other shots it is closed.
When Lainie mentions that the victim had been poisoned with colchicine, Castle mentions that it is a drug used to treat rheumatism. The most common condition treated with colchicine is gout, not rheumatism. Colchicine is also used in plant breeding; treatment of seedlings with a colchicine solution doubles the chromosomes and enhances various characteristics of the plant; however, the treated plants are poisonous; only the succeeding generations are safe for consumption. An episode of Quincy, M.E. (1976) featured a plot centered around stolen marijuana plants that had been treated with colchicine to increase their potency, becoming lethal to anyone who smoked them.
When Beckett suggests she and Castle can be each other's plus ones at Ryan's wedding, Castle agrees and says that way they could avoid the stigma of sitting at the single's table. However, in a previous scene, Ryan told Esposito that Jenny had a seating chart, so Castle and Beckett's last minute change wouldn't affect their seats.
When Esposito answers his phone at the start, it's still locked.
When Esposito answers a call about the flight attendants whereabouts, the phone doesn't ring.
Charlotte Roth is suppose to be Israeli but her accent is maybe Persian or Indian. Not close to Isreali.