5x20: The Sentinel
5x19: Menace
5x18: The Warrior
5x17: Fail Safe
5x16: Last Stand
5x15: Summit
5x14: 48 Hours
5x13: Proving Ground
5x10: 2001
5x08: The Tomb
5x07: Beast of Burden
5x06: Rite of Passage
5x05: Red Sky
5x04: The Fifth Man
5x03: Ascension
5x02: Threshold
5x01: Enemies
4x22: Exodus
4x21: Double Jeopardy
4x20: Entity
