The Watchers is fictional order of humans who record the lives and activities of immortals in Highlander: The Series and Highlander: The Raven, as well as related stories and movies.

In the Highlander franchise, Immortals are humans born with an energy called the Quickening that activates after a violent death. From then on, they are ageless and heal from all wounds, only dying if beheaded. Able to take each other's Quickening through killing, many immortals wage a secret war called the Game, believing that one day the last few will meet for the Gathering and a final battle will take place. The survivor will win the Prize, the collected power of all immortals who ever lived, enough power to enslave humanity or lead it into a golden age. The series follows Duncan MacLeod, an immortal born in the Scottish Highlands.

The secret organization of the Watchers was introduced in the season 1 finale of Highlander: The Series as a cliffhanger for the subsequent season. Since then, they became an integral part of the series and Duncan MacLeod's adventures, particularly the Watcher named Joe Dawson who became a series regular starting in season 2.