Rebecca Ferguson was originally cast but dropped out due to scheduling conflicts. Keeley Hawes replaced her.
A film about Patricia Neal and Roald Dahl, based on the book "An Unquiet Life" by Stephen Michael Shearer.
At around 10 minutes Gus says "Klaatu, Barada, Nikto" this is the phrase that Klaatu tells Helen Benson to say to the robot Gort in 'The Day The Earth Stood Still' (1951) should anything happen to him. Patricia Neal starred as Helen Benson in the film.
Hugh Bonneville (Dahl) and Keeley Hawes (Neal) both appeared in The Vicar of Dibley series finale, although they weren't on screen together.