Peter Capaldi is a thrillingly perfect choice for Doctor Who And there, smiling warily into the light, was Peter Capaldi - the floppy-haired boy who refused to kill Trudy the rabbit in Local Hero; the sabre-toothed lamprey of The Thick of It - and a thrillingly perfect choice for the twelfth Doctor. Perfect, particularly, for fans of my generation. For the first time since June 2005, the owner of the TARDIS is older than I am. By this afternoon, parents all over Britain will be horrified to discover that their internet-savvy kids are au fait with Malcolm Tucker's foulest insults. And though Capaldi's Doctor will not use phrases like "sweaty octopus," he will be capable of comparable fury. Mathew Sweet is a TV presenter