Morgan enters Camelot with her prisoners,claiming that they are traitors and that only she can save the realm from the marauding bands. Confronting Ygrain in private she kills her. Arthur does a sterling job of holding the attackers at bay using booby traps until his men return to rout the invaders though Leontes is slain. The knights return to Camelot where Sybil takes the blame for the conspiracy and is executed by an unconvinced Gawain.