I've asked Chief O'Brien to come and look at them.

Chief O'Brien was also nowhere to be seen in any of their scans.

He would have to call Chief O'Brien down for a look.

He could only hope that it looked like something very different to Chief O'Brien.

Chief O'Brien, however, began to pace at the edge of the circular room.

But the person you really want to speak to is Chief O'Brien.

Chief O'Brien remembered in time not to roll his eyes again.

"Chief O'Brien, you had better not be telling me that/have to wear one of those!"

Chief O'Brien had no authority to make a statement like that.

I asked Chief O'Brien on my way here, but he didn't understand either.