3x22: Nemesis
4x02: The Other Side
4x01: Small Victories
4x03: Upgrades
4x04: Crossroads
4x07: Watergate
4x08: The First Ones
4x09: Scorched Earth
4x12: Tangent
4x13: The Curse
4x15: Chain Reaction
4x16: 2010
4x17: Absolute Power
4x18: The Light
4x19: Prodigy
4x20: Entity
4x21: Double Jeopardy
4x22: Exodus
