According to various tweets between ufotable staff, the final episode of Fate/stay night (2014) Season 1, episode 12, will be one hour long. The second cour of the series is slated to air next April, 2015.
Fate/stay night is a visual novel released by Type-Moon for the PC in 2004, and is the first in their Fate series. The visual novel was very successful and claimed the title of highest selling visual novel in that year. 2006 saw two adaptations of the game, a manga by Datto Nishiwaki and an anime series by Studio Deen. Additionally in that year, a light novel series titled Fate/Zero was written by Gen Urobuchi. It is a prequel to the visual novels, set 10 years prior. An anime and manga adaptation of Fate/Zero were created, with the manga written by Urobuchi himself in 2011 and the anime being animated by ufotable. A second season of Fate/Zero was also produced.
Raised by a mysterious sorcerer after the horrific death of his parents, Shiro Emiya has only just begun to help others using the small tidbits of magic that he’s learned. However, when he’s suddenly caught in a battle between two more powerful Magus, Shiro finds himself performing a spell above his expected ability, summoning the beautiful spirit warrior Saber to protect him! But safety is only momentary as Shiro and Saber now find themselves thrust into in a secret world of dark magic and deadly challenges: a no-holds barred duel to the death known as the Holy Grail War! At stake: a prize of unimaginable power. But can the inexperienced Shiro and Saber survive long enough to even enter the contest? First they’ll have to withstand waves of treachery and assassination, even as Shiro scrambles to learn everything he’ll need to know to stay alive as seven teams of Magus and Spirit Servants face off in mortal combat!