Brutal Orc-overseers ensure that the Orcs working the engines of Isengard continue their labours without respite or complaint.
'Do you see those brutes up on the platforms there? Those are the overseers that keep the rest of the Orcs in line.
'Orcs like each other only slightly more than the rest of us, so if there is no one watching over them, they are about as argumentative and lazy as a sack of rats.
'If you can slay those overseers as you make your way through Isengard, it may buy some time for the Rohirrim to gather their strength and their wits.'
Orc-overseers can be found throughout Isengard.
Dagoras asked you to defeat the Orc-overseers keeping the labourers of Isengard in line.
Dagoras is within the Ring of Isengard.
You should return to Dagoras with news of your success.