S01E11: 'The Labyrinth of Gedref'

Here are a few key details about what happens in the next episode of Merlin, as the first season hurtles towards its climax.

Arthur kills a unicorn while hunting.

There are more problems with Camelot's water supply.

Camelot faces ruin unless Arthur can repair the damage he causes.

The unicorn's owner Anhora gives Arthur some valuable advice.