They weren't watching TV--they weren't in the computer room or the library, and they weren't in the kitchen, either.
from Marked by P.C. & Kristin Cast
The anaphora emphasizes the fact that Zoey is looking in many different places for her friends, and she still cannot locate them. The dash sets apart the failed continuity of her search after looking in the first location.
Dogs were lingering outside--dogs were in the car and the garage, and dogs were in the house, too.