LOS ANGELES (AP) – Led Zeppelin hardly ever lets their songs be used in movies or on TV. But they’re making an exception for the NBC series “Revolution.” Next week’s episode will feature two Zeppelin songs, “Kashmir” and “Since I’ve Been Loving You.” It’s no coincidence that Revolution is produced in association with Warner Brothers Television, and Led Zeppelin has a deal with Warner Music Group’s publishing arm. The episode airs the same day the group’s “Celebration Day” album and DVD documentary are released.