Which organization do the Guardians of the Universe oversee in the DC series Lanterns?

The Guardians of the Universe oversee the Green Lantern Corps in the DC series Lanterns.

The Green Lantern Corps is an organization of intergalactic peacekeepers. Its members wear power rings that grant extraordinary abilities, making the Corps one of the central institutions in Green Lantern mythology. Hal Jordan is a veteran member, while John Stewart joins as a new recruit.

Lanterns uses the Corps as the cosmic foundation for an otherwise grounded detective story. Jordan and Stewart investigate a murder in Rushville, Nebraska, and Jordan suspects that the case may involve extraterrestrial forces. The mystery gradually leads toward darker questions and wider consequences.

The Guardians of the Universe are the ancient beings associated with the leadership and creation of the Corps. Laura Linney portrays one of the Guardians in the series. Sinestro, played by Ulrich Thomsen, is described as a former Green Lantern who was expelled after a failed coup attempt.

The Green Lantern Corps should not be confused with the Justice Gang, an organization that includes Guy Gardner. Checkmate and the Manhunters are also separate organizations or forces within the wider DCU and Green Lantern mythology.