The Nature of Things - Season 45
1 - Sex, Lies and Secrecy: Dissecting Hysterectomy
Air Date: September 16, 2004
2 - Terrible Lizards of Oz
Air Date: September 23, 2004
3 - Selling Sickness
Air Date: September 30, 2004
4 - Arktika: The Russian Dream That Failed
Air Date: October 7, 2004
5 - Shipbreakers
Air Date: October 14, 2004
6 - Clot Busters
Air Date: October 21, 2004
7 - Killed By Care: Making Medicine Safe
Air Date: October 28, 2004
8 - Tale of a Tiny Bird
Air Date: November 4, 2004
9 - Apocalypse Cow: The Mad Cow Story (Part 1)
Air Date: November 18, 2004
10 - Apocalypse Cow: The Mad Cow Story (Part 2)
Air Date: November 25, 2004
11 - Bhopal: The Search for Justice
Air Date: December 9, 2004
12 - Forbidden Forest
Air Date: January 6, 2005
13 - Passion & Fury: The Emotional Brain: Anger
Air Date: March 22, 2005
14 - Passion & Fury: The Emotional Brain: Love
Air Date: March 29, 2005
15 - Passion & Fury: The Emotional Brain: Fear
Air Date: May 11, 2005
16 - Passion & Fury: The Emotional Brain: Happiness
Air Date: May 18, 2005
17 - Fighting Fire with Fire
Air Date: May 26, 2005
18 - Being Caribou: Part 1
Air Date: June 2, 2005
19 - Being Caribou: Part 2
Air Date: June 9, 2005
20 - Whale Mission: The Last Giants
Air Date: June 23, 2005
21 - Whale Mission: Keepers of Memory
Air Date: June 30, 2005
22 - Origins of Human Aggression: The Other Story
Air Date: July 7, 2005
23 - Five Seasons
Air Date: July 14, 2005