Scenes from the Dr Who Christmas special have been filmed inside a Lancaster bomber based in Lincolnshire.
Filming took place on board Just Jane, which is based at East Kirkby Aviation Heritage Centre near Horncastle.
The episode, The Doctor, The Widow and The Wardrobe, features actor Alexander Armstrong flying the wartime plane.
The programme tells the story of a family evacuated to Devon, where they enter a magical wintry world after receiving a mysterious present.
The trailer, which features the Avro Lancaster Bomber NX611, can be seen on the BBC Dr Who website.
Louise Bush, from the heritage centre, said: "It was all kept very hush hush and we were not allowed to tell anybody what was happening.
"We didn't have the Dr himself but there is the back of him seen in one shot, so they had somebody who looked like him from behind." she said.
She added that it had been a tight squeeze getting the crew inside the Lancaster to film the scene with Alexander Armstrong.
The East Kirkby Aviation Heritage Centre is a family run museum set up as a living memorial to the 55,500 men of Bomber Command who lost their lives during World War II.
Other film projects at the museum have included the BBC series Land Girls and Antiques Roadshow.
- 15 April 2011