1x04: Who Goes There
1x02: Seeing Things
2x05: World in Changes
2x04: Crossroads
2x03: Adapt or Die
2x02: Angels of Death
1x08: Time and Tide
1x05: Suicide Blonde
1x04: Atonement
1x02: Feeding Frenzy
1x18: Apotheosis
1x17: Here Be Dragons
