18x08: Can the Elephant Be Saved?
18x07: Killing Machines
18x06: Earthquake!
18x05: The Blimp is Back!
18x04: Poisoned Winds of War
18x03: To Boldly Go...
18x02: Neptune's Cold Fury
18x01: The KGB, The Computer and Me
17x15: The Big Spill
17x14: The Bomb's Lethal Legacy
17x13: Disguises of War
17x12: Race for the Top
17x11: Poison in the Rockies
10x08: Sixty Minutes to Meltdown
10x07: Fat Chance in a Thin World
10x06: City of Coral
10x05: Asbestos: A Lethal Legacy
10x04: The Miracle of Life