Roberto Aguirre-Sacasa

On the eve of her sixteenth birthday, young sorceress Sabrina Spellman finds herself at a crossroads, forced to choose between an unearthly destiny and her own mortal boyfriend, Harvey. But Madam Satan, a deadly foe from her family's past, has arrived in Greendale, and she has her sights set squarely on the young witch. Can Sabrina face the challenge, or will her witching career -- and high school life -- end all too abruptly?

In season two, tensions between the Northside and Southside were at an all-time high, and a civil war seemed imminent. A riot brought out the worst (and best) of Riverdale and its citizens and culminated in the shocking arrest of Archie Andrews. This season, it's the start of junior year, and the gang is forced to think about something new, the future.