And now his watch is ended

[DC Tom]

http://www.theguardian.com/tv-and-radio/2014/aug/11/game-of-thrones-actor-jj-murphy-dies-four-days-into-filming

[thebandit27]

Personally, I think it'd be cool if they kept him in as a type of tribute. Maybe have his face be wounded in some way (assuming they want to use the character throughout the season) and then make the transition to another actor.

[Quester74]

..we shall never know his like again.