“Dissolution” and “Leaves” (series 2, episodes 6 and 7)

“Help” and “Gone” (series 2, episodes 4 and 5)

“Change” and “Mettle” (series 2, episodes 2 and 3)

“Chaos” and “Epiphanies” (series 1, episodes 5 and 6)

“Art” and “Battles” (series 1, episodes 3 and 4)

“Beginnings” and “Gatherings” (series 1, episodes 1 and 2)