Fate/Zero

Season 1, Episode 5

Episode Title: A Wicked Beast's Roar

Air Date: 2011-10-30

Overview:

Rider suddenly appears just the battle with Lancer reaches its climax, much to Saber's consternation. Undeterred, Rider calls out to the many people observing the fight from within the shadows...but it seems he's not the only heroic spirit drawn in by the battle.