England. 1925. At a lavish country house party, a practical joke appears to have gone horribly, murderously wrong. It will be up to the unlikeliest of sleuths - the fizzingly inquisitive Lady Eileen ‘Bundle’ Brent - to unravel a chilling plot that will change her life, cracking wide open the country house mystery.
| Writing | Agatha Christie | Novel |
| Production | Chris Sussman | Executive Producer |
| Production | Chris Chibnall | Executive Producer |
| Production | Suzanne Mackie | Executive Producer |
| Production | James Prichard | Executive Producer |
| Production | Andy Stebbing | Executive Producer |
| Production | Chris Sweeney | Executive Producer |
| Production | Joanna Crow | Producer |
