During the series, Gordon must win in hard situations, often without backup.

Both officers have had to make difficult arrests without backup.

The playing field is level here, and I'm not going to let you go without backup.

It was one of the hardest challenges that any military man had to face without backup.

He went to this man's apartment without backup, placing himself in danger.

Under these circumstances, we can't go in there without backup.

But it did suggest that the man and woman had been acting without immediate backup near or on site.

At least she was not foolish enough to try this without backup.

"What I want to know is why you went in there without backup."

Without backup, negotiation was out of the question for Ben.