"I suppose you know you're the single prisoner to escape," the admiral said.
The death of a single prisoner in Group 4 custody has rightly made headlines.
They cannot be trusted to guard a single wounded prisoner!
I do not have a single prisoner to reproach myself with.
Most of my men are dead, and we don't have a single prisoner to show for it.
He had expected excitement but they had not brought out a single prisoner yet.
Up to 10 men were kept in one cell built for a single prisoner, and their legs eventually became paralyzed.
Conditions are cramped, with three inmates sharing a cell designed to house a single prisoner.
We were not allowed to be alone with a single prisoner for a single moment.
He's probably the single most secure prisoner Starfleet has ever had.