: The title refers to the bioweapon case but also nods to the historical German plot to assassinate Hitler, a connection Esposito points out during the investigation.
: This marks the first time a Castle season premiere ended on a two-part cliffhanger. [S6E1] Valkyrie
: Back in New York, Alexis returns from Costa Rica with a new "fruitarian" boyfriend, Pi, adding a layer of comedic friction to the Castle household. Critical Perspective : The title refers to the bioweapon case
: Moving the action to D.C. makes the episode feel more like a "generic action-thriller" compared to the charm of the 12th Precinct. [S6E1] Valkyrie