A selection of Horizon programmes, spanning five decades, chosen to celebrate Horizon's 50th anniversary.
Dr Xand Van Tulleken and mathematician Dr Hannah Fry test dating site algorithms.
A biography of the space shuttle, from triumphs to tragedies, using the BBC archive.
Horizon launches the £10 million Longitude Prize 2014.
Michael Mosley examines the powerful science behind the ancient idea of fasting.
Nobel Prize winner Sir Paul Nurse examines why science appears to be under attack.
How infinity is older than time, bigger than the universe and stranger than fiction.
Documentary about Dr Temple Grandin, who can talk to the animals.
Horizon follows an expedition to the Andes in search of a missing plane. (2000)
The story of how and why Dolly the sheep came to be cloned. (1997)
British mathematician Andrew Wiles's bid to find proof for Fermat's last theorem.
Tracing the spread of AIDS across America. (1983)
Professor Richard Feynman of Caltech talks about his life and career.
The rise of the microprocessor and its effect on industry. (1978)
Horizon investigates the growing tendency to induce childbirth. (1975)
Programme about deafness in Britain today. (1973)
Horizon reports from the spacecraft centre in Houston, Texas. (1966)
The discovery by physicists of a unique particle. (1964)
The work of Buckminster Fuller, the inventor of the geodesic dome. (1964)