Critic's Notebook: Broadcasting the big strides in TV diversity

'Sleepy Hollow,' 'Scandal,' 'Brooklyn Nine-Nine' are among the series that show that broadcast networks have more diversity than their 'prestige' cable competition.When Fox's "Sleepy Hollow" became a hit this season, critics and viewers were so bowled over by its crazy-great premise — Ichabod Crane as a colonial war hero! Back to fight the Four Horseman of the Apocalypse! — that another revolutionary aspect of the show was often overlooked.