Adam Adamant Lives! is a British

British television

Public television broadcasting started in the United Kingdom in 1936, and now has a collection of free and subscription services over a variety of distribution media, through which there are over 480 channelsTaking the base Sky EPG TV Channels. A breakdown is impossible due to a) the number of...

 television series which ran from 1966 to 1967 on the BBC

BBC

The British Broadcasting Corporation is a British public service broadcaster. Its headquarters is at Broadcasting House in the City of Westminster, London. It is the largest broadcaster in the world, with about 23,000 staff...

. Proposing that an adventurer born in 1867 had been revived from hibernation in 1966, the show was a comedy adventure that took a satirical look at life in the 1960s through the eyes of an Edwardian (Adamant vanished in 1902 when Edward VII had been on the throne just one year).
The main character originally went through a number of possible names: "Cornelius Chance", "Rupert De'Ath", "Dick Daring", "Dexter Noble", "Aurelian Winton", "Magnus Hawke" and even "Darius Crud" before Sydney Newman

Sydney Newman

Sydney Cecil Newman, OC was a Canadian film and television producer, who played a pioneering role in British television drama from the late 1950s to the late 1960s...

 settled on Adam Adamant, named after the generic mineral term adamantine

Adamant

Adamant and similar words are used to refer to any especially hard substance, whether composed of diamond, some other gemstone, or some type of metal. Both adamant and diamond derive from the Greek word αδαμας , meaning "untameable"...

, which, since medieval times, has commonly referred to diamond

Diamond

In mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions...

.