Air date: 1973-01-04

Runtime: 60 min

Horizon examines sources of infection that have, and could still, cause epidemics in Britain.

Air date: 1973-01-11

Runtime: 60 min

This episode of Horizon features Immanuel Velikovsky and his theories about the solar system.

Air date: 1973-01-18

Runtime: 60 min

Horizon examines the doctrines and military strategies of the rival alliances of NATO and the Warsaw Pact countries.

Air date: 1973-01-25

Runtime: 60 min

Horizon looks into the problem of deafness in Britain.

Air date: 1973-02-01

Runtime: 60 min

A jewel robbery, a hit-and-run, and the Case of the Skeleton in the Sand Dunes illustrate the work of forensic scientists and the police they assist. How do they discover the characteristics of an individual bullet as it enters a body? How are blood stains identified or microscopic flakes of paint? How do voiceprints and lie-detectors work? The crime labs of Britain and America have different priorities and different techniques. Each can learn from the other. They also have different success rates. Britain's is currently better. But how long can we hold out against a rapidly rising tide of drugs and violence? What can we learn from American experience?

Air date: 1973-02-08

Runtime: 60 min

How easy is it to get sterilized? Should there be abortion on demand? Do we need a free contraceptive service? Our average family size is 2.5. To avoid a social and population crisis it needs to be 2.1. Aberdeen, one of the few cities to have a fully comprehensive family planning service, has already successfully cut its birth rate. The Government plan to withdraw this kind of free service. But, in the light of Aberdeen's success, should the Government be made to reconsider?

Air date: 1973-02-15

Runtime: 60 min

In this documentary by Horizon, we look at chemical warfare and the associated environmental problems that have given science a bad name.

Air date: 1973-03-01

Runtime: 60 min

Horizon explores how to make the future livable and prevent the effects of urban sprawl.

Air date: 1973-03-08

Runtime: 60 min

Horizon explains acupuncture theories and examines its validity in modern medicine.

Air date: 1973-03-22

Runtime: 60 min

Horizon illustrates the Circadian Cycle of your body clock as it relates to physical and mental efficiency.

Air date: 1973-04-05

Runtime: 60 min

In this episode, Horizon investigates the chances of survival and chances of a normal life for babies who are born underweight.

Air date: 1973-04-12

Runtime: 60 min

This Horizon documentary shows the work of the Cambridge Coral Starfish Research Group off of Port Sudan in the Red Sea.

Air date: 1973-04-26

Runtime: 60 min

In this report, Horizon studies the problem of backache and investigates some remarkable new spine research.

Air date: 1973-05-03

Runtime: 60 min

Horizon covers Heathrow Airport in England and in particular, the work which is being done to make it safe.

Air date: 1973-05-17

Runtime: 60 min

Horizon looks at the phenomena of memory and some recent discoveries about it made by scientists.

Air date: 1973-05-24

Runtime: 60 min

Horizon investigates the various ways of dealing with the growing problem of garbage.

Air date: 1973-06-07

Runtime: 60 min

In the episode, Horizon investigates modern intensive farming methods.

Air date: 1973-06-14

Runtime: 60 min

Horizon takes a realistic look at the new ideas and technology threatening Britain's railway system.

Air date: 1973-06-21

Runtime: 60 min

In this Horizon documentary, it deals with the expansion of television in Britain and the USA, especially with the growth of cable television.

Air date: 1973-07-05

Runtime: 60 min

In this episode of Horizon, you will find that many people suffer chronic pain and yet others cannot feel anything.

Air date: 1973-08-09

Runtime: 60 min

This report by Horizon examines the work of Sir Alister Hardy who has set up a research unit to examine religious experience.

Air date: 1973-09-24

Runtime: 60 min

Horizon presents a portrait of Konrad Lorenz and a review of his career and personal interests.

Air date: 1973-10-01

Runtime: 60 min

This episode of Horizon takes a look at the medical and educational treatment of spastics in Britain.

Air date: 1973-10-08

Runtime: 60 min

Horizon presents a documentary on the developments in botany resulting in new flowers and the mass production of plants from single cells.

Air date: 1973-10-15

Runtime: 60 min

In this episode of Horizon, Prof. John Taylor of the London University looks at the effects of gravity and the forces it exerts on the universe.

Air date: 1973-10-22

Runtime: 60 min

Horizon investigates the plight of the Pygmies, on the verge of extinction as a racial group.

Air date: 1973-10-29

Runtime: 60 min

This Horizon documentary is a biography of the Danish nuclear physicist, Nils Bohr, and his efforts to internationally control atomic energy.

Air date: 1973-11-05

Runtime: 60 min

Horizon looks at the rise in the number of people who smoke and the real health risks.

Air date: 1973-11-26

Runtime: 60 min

In this report, Horizon investigates why airplanes crash and shows accident investigators at work analyzing a film of an actual crash.

Air date: 1973-12-03

Runtime: 60 min

This episode of Horizon documents the sources, uses, and properties of the element mercury and examines its role in modern society.

Air date: 1973-12-17

Runtime: 60 min

Can we ever hope to wipe out diseases like influenza and small-pox? Will our weather get better - or worse? Is it possible to grow anything useful on large areas of moorland in this country? Diseases, climate and soil structure alter so slowly that patterns in them can only be found by studying how they've changed over hundreds and thousands of years. Dating methods, which slot all the changes into place, are the most important scientific tools for analyzing the past. And the news they give can advise - and warn - us about the future.

Air date: 1973-12-24

Runtime: 60 min

Horizon reports on the inhabitants islands east of New Guinea who have evolved a system of intercommunication called the Kula.