Fate/stay night - Season 1 - Eps 21: The Star of Creation That Divided Heaven and Earth
With the appearance of the mysterious Archer-class Servant, Saber tells Shirou to escape while keeps him occupied. However Shirou, knowning that Saber couldn't defeat him before, foolishly tries to attack him head on and with the snap of his fingers Shirou is quickly defeated. Will Saber have the strength to defeat him, esepecially now knowing his true identity; owner of all the world's treasures, the King of Heroes of ancient Uruk, Gilgamesh.Kirei Kotomine also seems to play a major part in the Holy Grail War and it's not because he's the mediator.
About Fate/stay night

Title: Fate/stay night
First Air Date: 2006-01-07
Last Air Date: 2006-06-17
Status: Ended
Rating: 7.3/10 (from 209 votes)
Language: JA
Seasons: 2
Total Episodes: 24
Network: Teletama
Genres: Animation, Sci-Fi & Fantasy, Action & Adventure
Production Companies: Studio Deen, Notes
Synopsis
Shirou Emiya lost his parents in a fire when he was young and was later adopted by the sorcerer Kiritsugu Emiya. Shirou is drawn into the Holy Grail War summons a female "Servant" known as Saber to protect him and obtain the Holy Grail.
Cast

Noriaki Sugiyama
Shirou Emiya (voice)

Ayako Kawasumi
Saber (voice)

Kana Ueda
Rin Tohsaka (voice)