PI: Obviously he was trying to make more of himself, sir.
TAGON: Yes, obviously. Self-improvement through... pithing. Very common.
PI: Not self-improvement, sir. Reproduction.
Balt Binion died of head trauma. His head grew back, but with an enemy brain in it. Maybe all dead Gavs come back that way...
ENNESBY: Pithing is the new press-ganging.
SCHLOCK: I'm ready to start burning the corpses.