1x11: Thieves' Honor
1x13: Mother of Invention
1x15: Ring of Truth
1x16: Moon in Gemini
1x17: Out of the Ashes
1x18: A Means to an End
2x03: Strange Attractors
2x04: Deus Ex Machina
2x05: Rites of Passage
2x07: Voices in the Dark
2x08: Crossing Jordan
2x09: Running on Empty
2x10: The Question
2x11: The Past Is Prologue