(l-r: Harry Newell, Freddie Popplewell, Rachel Hurd-Wood) - Seasons Eight and Nine

Three inter-dimensional beings, taking the form of human children just because it seemed to suit them, The Circle first contacted Willow last season, telling her they wanted the wicca to ascend and join them as their new 'Teach,' helping them monitor and protect the state of the world.

With the Circle under threat from the Caretaker, Willow is forced to delay her move while she tries to protect what will become her new family..