Every great horror film acts as a metaphor for some underlying truth, but Jordan Peele’s Us is one long metaphor.

In his well-received debut, Get Out (2017), Peele gave us a horror-comedy in which an Afro-American protagonist discovered that his white girlfriend’s parents and their friends were colonising the bodies of younger, healthier black people. Us extends this idea. The lead characters may be black but the entire United States is now mirrored by an underground zombie nation enslaved (unwittingly) by the folks on the surface.