Documentary that goes inside what remains of the world-famous Notre-Dame Cathedral in Paris. It is one year since the inferno devastated the vast timber and lead roof and the 850-year-old gothic masterpiece is still perilously close to collapse. Now, we follow the men and women fighting to secure the fire-ravaged structure. Lead dust from the vaporised roof contaminates the site, the stone ceiling is crumbling and a 500-tonne melted mass of scaffolding still hangs precariously over the cathedral, triggering alarms and evacuations. Now that the cathedral walls are supported by giant timber frames, chief architect Philippe Villeneuve urgently needs a complete picture of the damage sustained during the fire. He initiates an unprecedented collaboration between architects and scientists. Their mission is to meticulously analyse the fallen timber, stone and fractured glass to develop a decontamination and restoration plan. This unique opportunity will give a new insight into the medieval m

Three years after the devastating fire, Lucy Worsley has exclusive access to the Cathedral of Notre-Dame de Paris at a key turning point of the restoration. Work to rebuild and restore the monument is being ramped up in a bid to meet the ambitious deadline to reopen it to the public in 2024. Visiting Notre-Dame aged 16 inspired Lucy to work with historical buildings; this is a once-in-a-career opportunity to witness the rebirth of an icon close to her heart. Scaffolding now fills the interior of the cathedral, giving Lucy and the team unprecedented close-up access to every inch of the structure. Lucy meets scientists, historians and craftspeople working to return the 850-year-old Gothic masterpiece to its former glory. The fire coated Notre-Dame with tons of toxic lead dust, so specialists are now decontaminating the site. Unique access to the stunning rose windows allows Lucy and the stained-glass historians to uncover the mysteries of these enigmatic 13th-century works of art. An

Five years after the fire, Lucy Worsley revisits the cathedral of Notre-Dame de Paris as the historic church enters the final stages of its restoration, ahead of its reopening.