"Let him go," Derek barked. The guards let go, even though the taller one--Bryant--looked unhappy to do so. They knew the consequences of disobeying a werewolf, even if he wasn't the Alpha, and it was obvious that Derek was displeased. The guards misunderstand the reason for Derek's displeasure, however.
"Now, leave us," he commanded, his eyes glowing lightly, an obvious threat.
Once they're alone, Derek steps close to Stiles, looking him over for visible signs of damage. "...are you hurt?"