2x12: Army of Ghosts
2x13: Doomsday
3x01: Smith and Jones
3x03: Gridlock
3x07: 42
3x08: Human Nature
3x10: Blink
3x11: Utopia
3x12: The Sound of Drums
4x01: Partners in Crime
4x03: Planet of the Ood
4x05: The Poison Sky
