E1 - Seasons in the Sea

Aired: September 30, 1990

Sharks, rays, squids and blue whales live in the Pacific Ocean off the California coast.

E2 - Monkeys on the Edge

Aired: October 07, 1990

Three species of monkeys, the muriqui, the golden lion tamarin and the buffy-headed marmoset struggle for survival in Brazil's coastal Atlantic Forest.

E3 - Scandinavia: Land of the Midnight Sun

Aired: October 14, 1990

A look at how Norway and Sweden are affected by eight months of winter.

E4 - Scandinavia: Fresh Waters, Salt Seas

Aired: October 21, 1990

A look at the Swedish archipelago and Norway's fjords.

E5 - The Sisterhood

Aired: November 11, 1990

Africa's spotted hyena is a matriarch dominated, efficient predator.

E6 - Supersense: Sight and Sound

Aired: November 18, 1990

Sight and sound are experienced through animal eyes and ears.

E7 - Supersense: Super Scents and Beyond

Aired: November 25, 1990

Enhanced olfactory sensitivity; unique animal senses.

E8 - Supersense: Making Sense

Aired: December 02, 1990

Internal clocks guide life rhythms of eating, sleeping, mating, hibernation, birth and death.

E9 - Monkey Island

Aired: December 09, 1990

This program travels to the island of Cayo Santiago off Puerto Rico to study the behavioral patterns of a colony of feral Rhesus Macaques.

E10 - Grizzly Country

Aired: December 16, 1990

Rangers at Denali National Park in Alaska train hikers for planned encounters with grizzlies; Alaskan grizzly bears are seen salmon fishing at Brooks Falls.

E11 - The Wild Shores of Patagonia

Aired: January 13, 1991

Penguins, maras, guanacos, sea lions and killer whales highlight this portrait of Patagonia.

E12 - The Gulf: Portrait of the War Zone

Aired: February 17, 1991

In light of the Persian Gulf War and the recent oil spills, PBS airs an update of the 1984 episode of Nature, Treasures of the Gulf, that focused on the effects of the Iran-Iraq war on the fragile ecology of the Persian Gulf.

E13 - One Man's Kenya

Aired: February 24, 1991

The beauty of the African plains and the effects of tourism on the area.

E14 - The Elephants of Tsavo: Love and Betrayal

Aired: March 03, 1991

Filmmaker Simon Trevor, a former game warden, records the decimation of African elephants.

E15 - Grand Teton Wilderness

Aired: March 10, 1991

The natural and human history of the Grand Tetons and Jackson Hole, Wyoming.

E16 - Year of the Jackal

Aired: March 17, 1991

Life within a close-knit golden jackal family on the plains of Lemuta in Africa.

E17 - Black Bear of the North

Aired: March 24, 1991

Biologist Lynn Rogers follows the black bear out of hibernation and into the Minnesota woods.

E18 - Wild Dogs of Africa

Aired: April 07, 1991

The relationship within a wild dog pack on Africa's Serengeti Plains.

E19 - Marathon Bird

Aired: April 14, 1991

A profile of the albatross examines its traits and habitats, as well as the mysteries and myths surrounding it.

E20 - The Cat That Came in From the Cold

Aired: April 28, 1991

A polecat winters at a working farm in Wales, along with scavenging foxes, rats and birds.

E21 - Crown of the Continent: Waterton/Glacier National Park

Aired: May 12, 1991

Grizzlies, wolves and cougars roam Montana's rugged, pristine Glacier National Park.