3x20: Birthday Blues
3x19: Frost Bite
3x18: Ghost Town
3x17: The Midnight Sun
3x16: Metamorphosis
3x15: Separate Ways
3x14: Annie's Wedding
3x12: The Fortress
3x11: The Secret Route
3x10: Enter Marlene
3x09: The Genesis Pits
3x07: Paper Hero
3x06: Hard Times
3x05: Curtain Call
3x03: Lonely Soldier Boy
3x02: The Lost City
3x01: The Invid Invasion
2x24: Catastrophe
2x23: The Invid Connection