Alley may be paved, or unpaved, and a blind alley is a cul-de-sac. Modern urban developments may also provide a service road to allow for waste collection, or rear access for fire engines and parking. Because of geography, steps (stairs) are the predominant form of alley in hilly cities and towns. This includes Quebec City in Canada and in the United States Pittsburgh (see Steps of Pittsburgh), Cincinnati (see Steps of Cincinnati), Minneapolis, Seattle, and San Francisco as well as Hong Kong, Genoa and Rome. Some alleys are roofed because they are within buildings, such as the traboules of Lyon, or
Double Blind of the total number of television sets in American households, and a share means the percentage of television sets in use tuned to the program. In total viewers, "Double Blind" easily won "NCIS" and CBS the night. The spin-off "" drew second and was seen by 13.18 million viewers. Compared to the last episode "Revenge", "Double Blind" was down in viewers and even in adults 18–49. Douglas Wolfe from "TV Fanatic" gave the episode 4.8/5 and stated that "[the episode] can be summed up in one word: loyalty. Or, if you like, four words: "I've got your back". Never has