Quentin Travers is a member of the Watchers' Council (possibly its head, based on his actions and authority) who appears in Seasons Three, Five and Seven, and is played by Harris Yulin.
In his first appearance, "Helpless", he insists that Buffy undergo a ruthless rite of passage on her eighteenth birthday known as the Cruciamentum. The test consists of depriving Buffy Summers of her Slayer powers and forcing her to fight a vampire using cunning alone. Giles' reluctance to comply with the test and his paternal relationship with the Slayer leads Quentin to fire him as Buffy's official Watcher. Angered at having been subjected to the Council's rite of passage without her consent, Buffy informs Travers that if he appears in Sunnydale again she will kill him.
In Season Five, Quentin returns to Sunnydale with a group of Watchers and offers Buffy information on her new nemesis, Glory. However, he will only provide the information if she successfully completes a set of rigorous trials. After an encounter with The Knights of Byzantium, Buffy realizes that she is the one with the power, not the Watchers' Council. Buffy explains the new facts of life to Quentin and the Watchers with him: that they work for her, not she for them; that Giles will be reinstated as her Watcher at full salary (retroactively from the month he was fired); that their mission is to provide her with information as requested; and that otherwise they will stay out of her way. Quentin acquiesces to all of her demands.
He reappears briefly in Season Seven, being caught in the explosion at the Watchers' Council headquarters.
Travers' family is featured in the tie-in novel Spike and Dru: Pretty Maids All in a Row; Harold Travers, John Travers (Harold's son) and Arianna de la Croix (a Potential Slayer turned Watcher who falls in love with John).