|Directed by||Kristoffer Nyholm|
|Written by||Celyn Jones
|Edited by||Mike Panikkou|
On October 31, 2016, it was announced that a psychological thriller Keepers was in development, which Kristoffer Nyholm would make his directing debut from a script by Celyn Jones and Joe Bone. Cross Creek Pictures would fully finance the film, which would be produced by Andy Evans, Ade Shannon, and Sean Marley for Mad as Birds along with Gerard Butler and Alan Siegel for G-BASE, and Brian Oliver for Cross Creek. Butler and Peter Mullan would star as James, Thomas, and Donald, respectively, in the film inspired from a true unresolved story.
- Tartaglione, Nancy (31 October 2016). "Gerard Butler, Peter Mullan, Joe Alwyn Playing For 'Keepers' – AFM". Deadline. Retrieved 31 October 2016.
- "Filming starts for Eilean Mor lighthouse movie". www.arbroathherald.co.uk. 18 April 2017. Retrieved 20 April 2017.