Synopsis

As Nora struggles to reconcile herself with the truth of Thawne's deed – his role in her grandmother’s death – the Flash team faces a formidable threat. A dangerous alliance has formed between the recently released Weather Witch and the Silver Ghost, a new villain wielding meta-technology that grants him control over engines and all manner of motorized devices. Separately, Caitlin and Cisco delve into the complex challenge of developing a cure for meta-humans.