When the team is attempting to figure out where Foyet is headed after the call with Hotch ends, Reid repeats the details of the call verbatim. While is possible he remembered because of the recency of the call, it can be considered a continuity error. In the premier episode of season two, The Fisher King: Part 2, Reid tells Garcia his eidetic memory "primarily refers to things he has read", which is why he had trouble remembering the origin of the poem from that same episode.
Garcia mentions that Robaxin is available over the counter. Actually, it is only available by prescription at this time. Other muscle relaxants can be purchased over the counter, but not this one.
Emily Prentiss mispronounces the city of Gaithersburg in Maryland. She calls it "Gadersburg", when it is actually pronounced "Gaithersburg" with the TH sound the same as the word "thin".