Plot: What exactly is Doctor Who's 'Frighten Factor'? A diverse panel of experts try to answer the question. With producer Barry Letts, script editor Terrance Dicks, education psychologist Lucy Lewis, church minister Peter Cavanna, Doctor Who Magazine's editor Tom Spilsbury and assistant editor Peter Ware, Doctor Who Adventures magazine editor Moray Laing and head writer Annabel Gibson, writer John Dorney, television archivist Jim Sangster and Doctor Who expert Alex Lydiate