|Eugene, Leonard and Jason make their way to New York to confront Dalton Kearn and retrieve a tape that proves the accusations Leonard has made against him.
This is the first time we hear from Officer O'Ryan in almost 200 episodes. He last appeared in ep. 417 "Not-so-Trivial Pursuits"
When Eugen, Leonard, and Jason go to clean Dalton's penthouse, while searching for the Ashanti box, Leonard surmises that it is in the artifact room, which is locked. Later, just after going in the elavator, Eugene says, "Now, we just have to figure out how to get through that door." There is no way he could know this as he was talking to the guard the whole time.