Sapphire Films Ltd. was a British television production company, active in the 1950s. Amongst their best-known series are The Adventures of Robin Hood, The Adventures of Sir Lancelot, The Buccaneers, and The Four Just Men produced for ITC Entertainment and screened on ITV in the UK, as well as being synicated in the United States.
Sapphire Films was founded by producer Hannah Weinstein with initial funds from the Hollywood branch of the Communist Party USA. Weinstein hired nearly two-dozen blacklisted American writers to script The Adventures of Robin Hood (and later The Four Just Men) under pseudonyms, and instituted elaborate security measures to ensure that the writers' true identities remained secret.
- Andreas Fickers; Catherine Johnson (13 September 2013). Transnational Television History: A Comparative Approach. Routledge. pp. 77–78. ISBN 978-1-135-76032-8.
- Matthews, Tom Dewe (October 7, 2006). "The outlaws". The Guardian. Retrieved January 15, 2018.