Despicable Acts (episode)

Despicable Acts is the seventh episode of Fate/stay night.

Summary
Saber confronts Shirou over not summoning her against Rider. After discovering that Shirou can detect magical spells related to the force field at school, Rin and Shirou set out to destroy most of them. However, at the end of the day, Shirou discovers in the dojo at the school a very large magical seal and finally finds out who Rider's Master is.