Four score, and about seven months later, Sleepy Hollow comes galloping back to our television screens with a whole host of new diabolical dilemmas (say that five times fast), and some updated hair styles in its third season premiere. “I, Witness” introduces us to a couple of new characters but fear not, our beloved Ichabod (Tom Mison), Abbie (Nicole Beharie), and Jenny (Lyndie Greenwood) return; however, there is a change in the air.