Watch Series: The Celts: Blood, Iron and Sacrifice Released in (2015) - Season 1 produced by UK, The TV Series categorized in Documentary, History, and content rating 1h with duration 50 min broadcasted as these networks BBC Two, Streamed at Putlocker & directed by Jeremy Hall, Michael Lachmann. Three-part documentary series in which anthropologist professor Alice Roberts and archaeologist Neil Oliver go in search of the Celts - one of the world's most mysterious ancient civilisations. - Season 1