Horizon 11

A Matter of Self-Defense (1974)

This episode of Horizon explains how our body fights infections and cancers and brings us up-to-date on recent research in immunology.

Bird Brain - The Mystery of Bird Navigation (1974)

This episode of Horizon is about various experiments on migratory birds and homing pigeons to try and discover how they navigate.

Never Too Late to Learn (1974)

Horizon reports on the British Open University and how it operates.

The Great Fish Hunt (1974)

Horizon investigates how Britain has hunted fish in the past and how improved fish catching techniques have severely reduced fish stocks.

Pedal Power (1974)

This episode of Horizon is about the history of the bicycle and the possibility of it being able to ease the traffic problems in Britain.