Fox has canceled Sleepy Hollow after four seasons. The fantasy-cop drama saw its ratings plummet in season four, averaging a 0.5 rating in the 18-49 demo and 1.9 million total viewers — down 40% in the demo and and 37% in viewers from season three. “Sleepy Hollow” is the latest series at Fox to be cancelled, following “Rosewood” and “Pitch.”