Secret Knowledge (2013)
- HD 1080
- Runtime: m.
- Status: Returning Series
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- Languages: en
- Country: United Kingdom
- Production_studio: BBC Four
- Seasons: 1
- Episodes: 21
- First air date: 2013-03-05
- Last air date: 2016-10-31
- The Secret Knowledge is featured in the top rankings of 2013
- #89 in Top Documentary Series of 2013
In a series of authored films, some of our most engaging experts reveal their favourite hidden objects, forgotten places and artistic passions.