Ok, but for the record, Connections aired in 1976. "1976-1979 Connections (BBC / Time Life). Ten-part series surveying the history of technology and social change. When first broadcast in the USA (PBS), it achieved the highest-ever audience for a documentary series. The series is used in over...
If it made connections between the most unlikely things, from the steam engine to how we clean clothes, it may have been Connections. An excellent series with a British host. I don't recall if they made an episode about gold.