Tangata Whenua was a groundbreaking six-part documentary series that screened (remarkably in primetime) in 1974. Each episode chronicled a different iwi and included interviews by historian Michael King with kaumātua. These remain a priceless historical record. The Feltex Award-winning script was by King and director Barry Barclay. The NZBC said the series had "possibly done more towards helping the European understand the Māori people, their traditions and way of life, than anything else previously shown on television". Paul Diamond writes about Tangata Whenua here.
Long-running travel series Intrepid Journeys took Kiwi celebrities (from All Blacks to music legends to ex-Prime Ministers) from the comfort of home to less-travelled paths in varied countries and cultures. The Jam TV series debuted in 2003 on TV One. With its authenticity and fresh, genre-changing take on a travel show (focusing on personal experience rather than objectivity), Intrepid Journeys was a landmark in local factual television. It managed to achieve the rare mix of high ratings and critical acclaim.