1x01: The Fort
10x04: Knock Knock
10x03: Thin Ice
10x02: Smile
10x01: The Pilot
9x12: Hell Bent
9x11: Heaven Sent
9x10: Face The Raven
9x09: Sleep No More
9x07: The Zygon Invasion
9x05: The Girl Who Died
9x04: Before the Flood
