www.eonline.com -By CHARLOTTE WALSH -Ahead of The Winchesters season one finale, Meg Donnelly, who plays Mary, exclusively teased to E! News how, exactly, the Supernatural prequel will end—and which OGs are making cameos.
people.com -By Kelsie Gibson -
"We want to make sure that the fans are so happy," Donnelly tells PEOPLE exclusively about The CW's Supernatural spin-off The Winchesters