Banshees Blackwell’s roller derby team, the Banshees, are missing a member. Allison Harris, AKA Gator, has disappeared without a trace. The town has stopped searching for her, and all seem resigned to their grief, until one night, Ivy and the rest of the team receive a phone call from team captain, Bronagh: it’s time. Determined to find Gator and bring her home, the Banshees embark into a dark and cold night.

• Supernatural