1x01: Episode 1
1x02: Episode 2
1x03: Episode 3
1x04: Episode 4
1x05: Episode 5
1x06: Episode 6
2x01: Old Friends
5x01: Genesis
4x10: The Shadows
4x09: The Inferno
4x08: The Imposter
4x02: Something Sharp
3x10: The Reckoning