TV doctor Michael Mosley, famous for popularizing the 5:2 diet, has gone missing while on holiday on the Greek island of Symi.

The 67-year-old dieting guru, familiar to British viewers from his appearances on This Morning, did not return from a hike on the island of Symi, near Rhodes, which is part of the Dodecanese chain of islands.

A comprehensive search and rescue operation is currently underway, involving a police dog, a drone, and a helicopter from Athens to assist in the search, according to Symi's deputy mayor.

Dr. Mosley, who is well-known for his work on programs such as the BBC series Trust Me, I'm a Doctor and appearances on BBC's The One Show and ITV's This Morning, left his wife on the beach to walk to the center of the island on Wednesday. His phone was found at their accommodation, and his wife reported him missing, as confirmed by a police spokesperson.

After initial efforts by island officers proved unsuccessful, assistance was requested from the Greek fire department in Athens. Firefighters arrived from nearby Rhodes at 14:00 local time (12:00 BST) on Thursday. The search team includes firefighters, volunteers, police officers, a police dog, and a drone. Officers are also reviewing CCTV footage for any signs of Dr. Mosley.

The rescue operation is focused on the Pedi area of Symi, following a report of a sighting on Wednesday. Despite the area's dangers, Dr. Mosley was reportedly seen in a safer part of it. Symi's mayor, Eleftherios Papakalodoukas, expressed skepticism that Dr. Mosley remained in the area, suggesting he might have taken a different path or fallen into the sea.

An appeal with Dr. Mosley's picture was posted on a local Facebook group, describing him wearing a blue cap, polo shirt, and shorts, and noting that he had set off from Agios Nikolaos beach around 13:30 and failed to return.

Symi, part of Greece's Dodecanese island group, has a population of around 2,600. The UK Foreign Office has stated they are supporting Dr. Mosley's family and are in contact with local authorities.

Authorities are urging anyone with information about Dr. Mosley's whereabouts to come forward. Family and friends of Dr. Mosley have expressed their deep concern and hope for his safe return.

The local community has rallied together, distributing flyers and organizing search parties to help find him. Social media campaigns have been launched to spread awareness and gather any potential leads.

Experts in search and rescue operations have been flown in to assist with the complex search effort.