1x07: Nepenthe
2x02: Penance
2x04: Watcher
2x06: Two of One
2x07: Monsters
2x08: Mercy
2x10: Farewell
3x24: Turnabout Intruder
3x23: All Our Yesterdays
3x22: The Savage Curtain
3x21: The Cloud Minders
