By Joe Inwood, Kostas Kallergis for BBC News
New CCTV appears to show Michael Mosley walking towards rocky hills in the village of Pedi. Photo: Facebook
"We will not lose hope," the wife of missing TV and radio presenter Michael Mosley has said, as efforts to find him continue on the Greek island of Symi.
The 67-year-old vanished after setting off on a walk on Wednesday.
His wife Dr Clare Bailey Mosley said in a statement that the days since he went missing had been "the longest and most unbearable".
Teams of police, firefighters and volunteers are now into a fifth day of searching for Dr Mosley, known for his TV programmes and BBC Radio 4's Just One Thing podcast.
Emergency crews in the area called off the search on Saturday evening as night fell as the search area is too dangerous to explore in the dark.
Efforts to trace Mosley are due to resume on Sunday morning.
In her statement, Bailey Mosley said: "It has been three days since Michael left the beach to go for a walk. The longest and most unbearable days for myself and my children.
"The search is ongoing and our family are so incredibly grateful to the people of Symi, the Greek authorities and the British Consulate who are working tirelessly to help find Michael.
"We will not lose hope."
Bailey Mosley has been searching the island assisted by friends. The couple's four children have also arrived on Symi to help with the search.
Michael Mosley went missing on Wednesday after leaving his wife on Agios Nikolaos beach about 1.30pm local time.
His wife later reported Mosley, who did not have his phone, missing.
CCTV footage of a man believed to be Mosley walking with an umbrella in the village of Pedi. Photo: Live News / Mega TV via BBC News
BBC News has seen new CCTV - one of the last-known sightings - of a man believed to be Mosley walking with an umbrella next to the marina in the village of Pedi on Wednesday, heading towards rocky hills.
The new footage, recorded about 2pm local time, appears to show the man walking steadily and unaided, an unnamed police officer told BBC News.
Greek authorities have since shifted their search operation to this part of the island.
In the mountainous terrain it would be easy to fall and injure yourself, or wander off the trail and get lost.
One theory that has emerged is that Mosley was trying to take a much longer route than previously thought, passing over miles of exposed hillside. His accommodation was in the main town about 1.6km from Pedi.
When BBC News walked a short bit of the same path Mosley is believed to have followed, under the midday sun, the effects of the heat could be felt quickly.
So far, police and firefighters have been using drones, a helicopter and a sniffer dog to try to locate the missing presenter.
Divers have also been looking in the water, as well as patrol boats, private boats and commercial boats, Symi's coastguard said.
Symi's mayor Eleftherios Papakaloudoukas said the search will continue until Mosley is found.
Papakaloudoukas added he was unsure why the missing presenter would try to make a long, potentially arduous journey in such heat, but hopes he is found "safe and alive".
Before moving into TV, Mosley studied medicine in London and qualified as a doctor but for the last couple of decades has been working as a presenter, documentary maker, journalist and author.
He has appeared on BBC One's The One Show and ITV's This Morning.
Mosley is also columnist for the Daily Mail and his TV programmes also include Channel 4 show Michael Mosley: Who Made Britain Fat? and BBC show Trust Me, I'm A Doctor.
His wife is also a doctor, author and healthy living advocate.
Timeline
- Wednesday 1.30pm local time - Dr Michael Mosley leaves his wife Clare on Agios Nikolaos beach and sets off on a walk
- 1.50pm - Man carrying umbrella is seen on CCTV in Pedi
- 1.57pm - Same man is seen again at Pedi's marina heading north-east
- Thursday 11.15am - Police are unable to find the presenter, so they inform Athens and request assistance from the Greek fire department
- 2pm - Greek fire services, with six firefighters and a drone team, arrive in Symi
- 7pm - Helicopter deployed to assist search
- Friday - Divers join the search in the water around Symi
- Saturday 6am - Firefighters resume search for Mosley
- 2pm - His wife Clare says the Mosley family "will not lose hope" and thanks those involved in the search