All Seasons

Season 1

• S01E01 Unseen Worlds

  • October 28, 1987
  • PBS

• S01E02 To the Edge of the Earth

  • January 7, 1988
  • PBS

• S01E03 The Fires of the Mind

  • April 6, 1988
  • PBS

• S01E04 The Geometry of Life

  • June 1, 1988
  • PBS

Season 2

• S02E01 The Search for Ancient Americans

  • September 7, 1988

• S02E02 The Great Dinosaur Hunt

  • January 4, 1989

• S02E03 Life in the Balance

  • March 29, 1989

• S02E04 Living with Disaster

  • June 7, 1989

Season 3

• S03E01 The Champion Within

  • September 6, 1989

• S03E02 Crisis in the Atmosphere

  • November 29, 1989

• S03E03 The Future of the Past

  • February 28, 1990

• S03E04 Living Clock

  • April 11, 1990

Season 4

• S04E01 Keepers of Eden

  • October 1, 1990

• S04E02 Sail On, Voyager!

  • November 28, 1990

• S04E03 Miracles by Design

  • February 19, 1991

• S04E04 A Taste of Health

  • April 17, 1991

Season 5

• S05E01 Secrets from a Frozen World

  • September 29, 1991

• S05E02 Prisoners of the Brain

  • December 1, 1991

• S05E03 Insects: The Ruling Class

  • April 8, 1992

• S05E04 The Dawn of Humankind

  • May 6, 1992