It featured pioneers who have been recognised for finding innovative solutions to the most pressing climate issues.
In the 1960s and 70s Philip famously fronted three nature programmes made in Africa which addressed the threat humans posed to wildlife.
In his own programme William, 39, spoke with winners of The Earthshot Prize, a global competition which recognised people who have helped make the planet greener.
He launched it alongside The Royal Foundation in October last year.
The Duke was seen today picking up rubbish as he urged people, businesses and leaders to do their “bit” and set their “own personal Earthshots” to help safeguard the planet ahead of the series.
The duke told viewers: “We must act now to create a different future for our children and grandchildren.
“We stand at a fork in the road.
Despite his stark warning, the 39-year-old heir to the throne said that it was not too late to turn back the clock.
He told viewers that saving the planet “is within our reach” if change happens soon.
William said: “This is a moment for hope, not fear.
“It’s for this very reason that I launched the Earthshot Prize, the most ambitious environmental prize in history.
“A decade of action to repair our planet.”
Sir David is equally upbeat on the prospect of humanity becoming effective stewards of the planet.
He said: “Just imagine what might be possible.”
Winners included a 14-year-old girl from India who has designed a solar-powered ironing cart, the nation of Costa Rica, which has pioneered a project paying local citizens to restore natural ecosystems, and a Chinese app that allows its citizens to hold polluters to account.
Each episode of the BBC series will focus on a different environmental issue – protecting and restoring nature, fixing the climate, combating air pollution, reviving the oceans, and tackling waste.
Episodes will air in the build-up to the United Nations Cop26 climate summit hosted in Glasgow from November 1.
Jason Knauf, chief executive of The Royal Foundation, said: “Over an unprecedented two-week period, television and radio audiences will be inspired by what we believe is some of the most innovative environmental programming that has ever been created.
“The television and radio series along with the awards ceremony will celebrate the incredible Earthshot Prize Finalists, while inspiring and challenging all of us to play our part in this decisive decade for the planet.’”
An awards ceremony for the inaugural Earthshot Prize at Alexandra Palace in London on October 17 will also be aired on BBC One.
Source: EXPRESS CO UK