Horizon

Sudden Death

1991-01-07

Keen as Mustard

1991-01-14

Smokers Can Harm Your Health

1991-01-21

Coming In from the Cold

1991-01-28

Small Problems with the Mirror

1991-02-04

Two Weeks to Save the Earth

1991-02-10

California Dreaming

1991-02-11

The Day the Earth Melted

1991-02-25

The Curse of Karash

1991-02-25

Playing at Noah

1991-03-04

Cashing in on Paradise

1991-03-11

The Terracotta Time Machine

1991-03-18

Measuring the Roof of the World

1991-03-25

The First Americans

1991-04-15

Inside Chernobyl's Sarcophagus

1991-04-22

Colonising Cyberspace

1991-04-29

Emerging Viruses

1991-05-13

Camelford - A Bitter Aftertaste

1991-05-20

Of Big Bangs, Stick Men and Galactic Holes

1991-06-03

Food For Thought

1991-06-10

The Long Road to the West

1991-06-17

T-Rex Exposed

1991-07-01