I hated the Temporal Cold War from the moment it began in "Broken Bow". Braga claimed it was the result of the network wanting something futuristic. Something futuristic in a science fiction series? Oh, please. That doesn't necessarily mean the TCW was the network's idea, no matter how Braga wants to paint it after the fact. It was bad enough the pilot had to introduce the Enterprise, its crew, and its mission, but it saddles us with this big mysterious war and its various factions as well. Even the more popular Xindi Arc is part of it, as an arc within an arc. The damn TCW even stretches into the start of the 4th season, so until the network said wrap up the arc, they must have intended for it to run 7 years.