Paranormal investigators on the TV show Most Haunted claim to have captured a ghost on film for the first time in the programme's history.
Described by host Yvette Fielding as the show's most 'ground-breaking' footage to date, the chilling clip shows what appears to be a male figure walking through a doorway and down a dark corridor at Wentworth House, in South Yorkshire.
The crew was investigating reports of a ghostly presence inside the stable block at the 17th century mansion, following dozens of unexplained sightings, and 'gobsmacked' Fielding says what they found left her 'sobbing'.
Moments before the sighting, a member of the crew is heard saying: 'If you're here, walk up this corridor,' after hearing footsteps.
What appears to be a white figure is then seen walking through the doorway the camera is facing.
Crew member Stuart can then be seen running after the figure and into another room, before it vanishes.
Fielding told MailOnline it was the most 'ground-breaking' footage the show had ever recorded.
'In the 17 years we've been doing Most Haunted we've always wanted to capture a ghost on camera,' she said.
'We've caught so many different kinds of phenomena: objects moving on their own, voices. But this is the first time that we've caught a man walking - in what appears to be slow motion up some stairs.'
Although she didn't see the figure from the same angle as caught on camera, she claims to have seen it from a different direction.
'I was walking towards the stairs from a different direction and along with another crew member I saw the dark shape of a man walking up the stairs.
'When I saw the footage at the end I knew we had caught something. But I wasn't sure we had got it on camera. It was only when we edited it that I saw it and I burst into tears.
'I was so gobsmacked - I was properly sobbing.'
Karl, who helped film the episode, told MailOnline he and Stuart went into the corridor after hearing footsteps while in an adjacent room.
'We were looking down the corridor and discussing where we heard the footsteps when literally out of the blue we saw a figure in the distance walking up the stairs.
'Stuart ran straight after it but we couldn't find anything in any of the rooms.'
When they told Yvette about the sighting, she claimed to have seen what she thought was Stuart walking up the stairs.
'I said: "You couldn't have seen Stuart walking up the stairs, you'd have seen us run up the stairs,"' said Karl.
'She said: "I did see Stuart because I said are you OK and he ignored me." But I told her she couldn't have because he was with me at that time.
'That was what made it special for me because you always try to get two independent people to see the same thing from different angles.'
He added: 'We've never seen anything like this before and we really don't have an explanation for what we saw but the replay of the filming, clearly shows the vision in detail. It's a weird, weird place.'
Wentworth Woodhouse was built in 1630 by the first Earl of Stafford. Back in the day it would have been a hive of activity as a community in its own right, with hundreds of people living there.
It is now derelict and in recent years part of it was converted into squash courts.
Yvette said: 'People have claimed to have witnessed many paranormal occurrences from dark shadows to slamming doors. Along these corridors, the most prevalent spectre is that of a large man who once seen disappears into the night and it's a mystery.
'It's a figure that's been seen in and around the building. Lots of people have seen him, a large figure of a man endlessly walking the corridors. No wonder we grabbed the opportunity to return to this formidable estate. I want to know why he's here and why so many people have seen him.'
Other apparent paranormal activity detected during the investigation included noises, doors slamming, objects being thrown and chairs unexpectedly appearing.
Most Haunted - Wentworth Woodhouse Stable Block transmits tonight at 10pm on Really.