Alfie Williams, Jodie Comer, and Ralph Fiennes in 28 Years Later. Photo: Miya Mizuno/Sony Pictures At the heart of Danny Boyle’s 28 Years Later stands an eerie monument, a slender tower of skulls serving as a memorial to the dead. It’s a grim sight, surrounded by trees covered in bones, but one designed to stir compassion as well. “There are so many dead, infected and uninfected alike — because they are alike,” says its apparent creator, Dr. Ian Kelson (Ralph Fiennes), who in the years