The gang behind WGN America‘s first original scripted series Salem took some flak from critics during the TCA press tour last week for taking liberties with the Salem Witch Trials — an ugly period of social injustice in this country. In creators Brannon Braga and Adam Simon’s Salem, the witches are real, though not what they seem. Here’s the first official trailer — to be shown on WGN beginning this weekend. The series premieres April 20: