Season 1 → View Guide

	1x01 Making of a Natural History Film (The) (Air Date: Mar. 03, 1974) [add summary]
	1x02 Where Did the Colorado Go? (Air Date: Mar. 10, 1974) [add summary]
	1x03 Whales, Dolphins, and Men (Air Date: Mar. 17, 1974) [add summary]
	1x04 Search for Life (The) (Air Date: Mar. 24, 1974) [add summary]
	1x05 Last of the Cuiva (Air Date: Mar. 31, 1974) [add summary]
	1x06 Strange Sleep (Air Date: Apr. 07, 1974) [add summary]
	1x07 Crab Nebula (The) (Air Date: Apr. 14, 1974) [add summary]
	1x08 Bird Brain: The Mystery of Bird Navigation (Air Date: Apr. 21, 1974) [add summary]
	1x09 Are You Doing This for Me, Doctor? (Air Date: Apr. 28, 1974) [add summary]
	1x10 First Signs of Washoe (The) (Air Date: May. 05, 1974) [add summary]
	1x11 Case of the Midwife Toad (The) (Air Date: May. 12, 1974) [add summary]
	1x12 Fusion: The Energy of Promise (Air Date: May. 19, 1974) [add summary]
	1x13 Mystery of the Anasazi (The) (Air Date: May. 26, 1974) [add summary]

Season 2 → View Guide

	2x01 Why Do Birds Sing? (Air Date: Nov. 03, 1974) [add summary]
	2x02 How Much Do You Smell? (Air Date: Nov. 10, 1974) [add summary]
	2x03 Hunting of the Quark (The) (Air Date: Nov. 17, 1974) [add summary]
	2x04 Secrets of Sleep (The) (Air Date: Nov. 24, 1974) [add summary]
	2x05 Inside the Golden Gate (Air Date: Dec. 01, 1974) [add summary]
	2x06 Men Who Painted Caves (The) (Air Date: Dec. 08, 1974) [add summary]
	2x07 Red Sea Coral (Air Date: Dec. 15, 1974) [add summary]
	2x08 War From the Air (Air Date: Jan. 05, 1975) [add summary]
	2x09 What Time is Your Body? (Air Date: Jan. 12, 1975) [add summary]
	2x10 Rise and Fall of DDT (The) (Air Date: Jan. 19, 1975) [add summary]
	2x11 Take the World From Another Point of View (Air Date: Feb. 02, 1975) [add summary]
	2x12 Lysenko Affair (The) (Air Date: Feb. 09, 1975) [add summary]
	2x13 Tuaregs (The) (Air Date: Feb. 16, 1975) [add summary]
	2x14 Plutonium Connection (The) (Air Date: Mar. 09, 1975) [add summary]
	2x15 Other Way (The) (Air Date: Mar. 16, 1975) [add summary]
	2x16 Lost World of the Maya (The) (Air Date: Mar. 30, 1975) [add summary]
	2x17 Will The Fishing Have to Stop? (Air Date: Apr. 06, 1975) [add summary]

Season 3 → View Guide

	3x01 Predictable Disaster (Air Date: Jan. 04, 1976) [add summary]
	3x02 Joey (Air Date: Jan. 11, 1976) [add summary]
	3x03 Meditation and the Mind (Air Date: Jan. 18, 1976) [add summary]
	3x04 Planets (The) (Air Date: Jan. 25, 1976) [add summary]
	3x05 Desert Place (A) (Air Date: Feb. 01, 1976) [add summary]
	3x06 Small Imperfection (A) (Air Date: Feb. 08, 1976) [add summary]
	3x07 Ninety Degrees Below (Air Date: Feb. 15, 1976) [add summary]
	3x08 Race for the Double Helix (The) (Air Date: Mar. 07, 1976) [add summary]
	3x09 Renewable Tree (The) (Air Date: Mar. 07, 1976) [add summary]
	3x10 The Williamsburgh File (Air Date: Mar. 14, 1976) [add summary]
	3x11 Overworked Miracle (The) (Air Date: Mar. 21, 1976) [add summary]
	3x12 Transplant Experiment (The) (Air Date: Apr. 11, 1976) [add summary]
	3x13 Underground Movement (The) (Air Date: Apr. 18, 1976) [add summary]
	3x14 Hunters of the Seal (Air Date: May. 02, 1976) [add summary]
	3x15 Benjamin (Air Date: May. 09, 1976) [add summary]
	3x16 Women Rebel (The) (Air Date: May. 23, 1976) [add summary]
	3x17 Death of a Disease (Air Date: Jun. 06, 1976) [add summary]
	3x18 Inside the Shark (Air Date: Jun. 13, 1976) [add summary]
	3x19 Genetic Chance (The) (Air Date: Jun. 20, 1976) [add summary]
	3x20 Case of the Bermuda Triangle (The) (Air Date: Jun. 27, 1976) [add summary]

Season 4 → View Guide

	4x01 Hitler's Secret Weapon (Air Date: Jan. 05, 1977) [add summary]
	4x02 Hot Blooded Dinosaurs (The) (Air Date: Jan. 12, 1977) [add summary]
	4x03 What Price Coal? (Air Date: Jan. 19, 1977) [add summary]
	4x04 Sunspot Mystery (The) (Air Date: Feb. 02, 1977) [add summary]
	4x05 Plastic Prison (The) (Air Date: Feb. 09, 1977) [add summary]
	4x06 Incident at Brown's Ferry (Air Date: Feb. 23, 1977) [add summary]
	4x07 Bye Bye Blackbird (Air Date: Mar. 02, 1977) [add summary]
	4x08 Pill for the People (The) (Air Date: Mar. 09, 1977) [add summary]
	4x09 Gene Engineers (The) (Air Date: Mar. 16, 1977) [add summary]
	4x10 Human Animal (The) (Air Date: Mar. 23, 1977) [add summary]
	4x11 Wolf Equation (The) (Air Date: Mar. 30, 1977) [add summary]
	4x12 Dawn of the Solar Age (The) (Air Date: Apr. 20, 1977) [add summary]
	4x13 Business of Extinction (The) (Air Date: Apr. 20, 1977) [add summary]
	4x14 Red Planet (The) (Air Date: Apr. 27, 1977) [add summary]
	4x15 Tongues of Men, Part 1 (Air Date: May. 11, 1977) [add summary]
	4x16 Tongues of Man, Part 2 (Air Date: May. 18, 1977) [add summary]
	4x17 Linus Pauling: Crusading Scientist (Air Date: Jun. 01, 1977) [add summary]
	4x18 Across the Silent Barrier (Air Date: Jun. 22, 1977) [add summary]
	4x19 New Healers (The) (Air Date: Jun. 29, 1977) [add summary]
	4x20 Green Machine (The) (Air Date: Jan. 11, 1978) [add summary]

Season 5 → View Guide

	5x01 In The Event of Catastrophe (Air Date: Jan. 04, 1978) [add summary]
	5x02 Blueprints in the Bloodstream (Air Date: Jan. 18, 1978) [add summary]
	5x03 One Small Step (Air Date: Jan. 25, 1978) [add summary]
	5x04 Final Frontier (The) (Air Date: Feb. 01, 1978) [add summary]
	5x05 BaMiki BaNdula: Children of the Forest (Air Date: Feb. 15, 1978) [add summary]

Episode Screenshots

Season 34, Episode 17

Season 34, Episode 07