Kristian Bruun, Melanie Scrofano, Andie MacDowell, Henry Czerny, Nicky Guadagni, Adam Brody and Elyse Levesque in the film Ready or Not. Photograph:  Eric Zachanowich

The big-house family murder is having a bit of a moment. Rian Johnson’s Knives Out – a breathlessly heightened Agatha Christie pastiche – has just pre(...)