Merlin

Season 1, Episode 4

Episode Title: The Poisoned Chalice

Air Date: 2008-10-11

Overview:

With her sights set firmly on Merlin, Nimueh tricks him into drinking from a poisoned chalice, and he falls dangerously ill. Arthur ventures forth deep into the forest of Balor to find the antidote, but little does he know that he's walking into a trap