Because “The Winchesters” isn’t just a spinoff, it’s a prequel: about how John Winchester (Drake Rodger) and Mary Campbell (Meg Donnelly), father and mother to “Supernatural’s” Sam ...

John and Mary's story is heating up. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The fall finale of The Winchesters has aired on The CW ...