"I thought you were on MY team."
What starts off as Castle & Beckett investigating a serial killer with serious "Nikki Heat" obsession quickly turns into a federal case led by the incomparable FBI Agent Jordan Shaw (guest star Dana Delany
) -- of whom Castle is a huge fan.
As for Beckett, not only is she contending with a psycho killer who wants her dead, but she also has to deal with suddenly becoming a third wheel on her own investigation. It doesn't help that while deducing this killer's profile and MO, Castle and Shaw are working a little too well together for Beckett's liking. Someone's getting a tad territorial, and we doubt it has anything to do with the case!