4x15: Chain Reaction
4x13: The Curse
4x12: Tangent
4x09: Scorched Earth
4x08: The First Ones
4x07: Watergate
4x04: Crossroads
4x03: Upgrades
4x02: The Other Side
4x01: Small Victories
3x22: Nemesis
3x21: Crystal Skull
3x19: New Ground
2x22: Out of Mind
2x21: 1969
2x20: Show and Tell
2x19: One False Step
