Esposito, Castle and others in “Deep in Death”

Esposito

You know what I don't get? Who would steal a dead body?

Castle

Oh, plenty of people. Organ harvesters, cadaver-less med students, Satanists. [pause] Mad scientists looking to create their own monster.

Beckett

Or the guys who killed him might have left some evidence behind.

Castle

Boring. How about a spy having swallowed a microchip that the enemy spies murder him over before the CIA can get ahold of him?