Zachariah is a fictional character portrayed by Kurt Fuller on The CW Television Network's drama and horror television series Supernatural. An angel, he first appears in the fourth season and helps manipulate the series protagonist Sam Winchester into releasing Lucifer onto the Earth. In the fifth season, he attempts to convince Dean Winchester into serving as the human vessel for the archangel Michael to start the apocalypse. The opportunity to play an angel initially excited Fuller because he thought that it would give him the chance to break away from his streak of playing villains. Despite the character turning into an antagonist halfway through his appearances, the actor was very proud of the role. Critical reception for the character has been positive, with his sinister humor being of particular note. Kurt Fuller later reprised the role in the show's 300th episode "Lebanon" in season 14, playing the Zachariah from an alternate timeline created by the disappearance of John Winchester in 2003.

Supernatural is an American television series created by Eric Kripke. It was first broadcast on September 13, 2005, on The WB, and subsequently became part of successor network The CW's lineup. Starring Jared Padalecki as Sam Winchester and Jensen Ackles as Dean Winchester, the series follows the two brothers as they hunt demons, ghosts, monsters, and other supernatural beings. The series was produced by Warner Bros. Television, in association with Wonderland Sound and Vision. Along with Kripke, executive producers have been McG, Robert Singer, Phil Sgriccia, Sera Gamble, Jeremy Carver, John Shiban, Ben Edlund, and Adam Glass. Former executive producer and director Kim Manners died during production of the fourth season.