What episodes of Merlin is Merlin hurt?

In the series "Merlin," there are several episodes where Merlin is hurt. Notably, in "The Poisoned Chalice" (Season 1, Episode 6), he is poisoned while trying to protect Arthur. In "The Coming of Arthur" (Season 2, Episode 12), Merlin faces danger during the battle against Morgana's forces, and in "The Last Dragonlord" (Season 3, Episode 5), he is injured while trying to save a dragon. These moments highlight the risks he takes to protect Arthur and the realm.