
The pilot episode had over 12.5 million viewers, and on the second season, the episode "Horizon" had only 3.36 million viewers.
And still Enterprise has been given a another chance. They have been given a third season. If the ratings continues to fall at this rate, the third season will probably and hopefully be the last one. Other shows wouldn't have been given a chance like this.
I just hoping for the day when the news comes when Entrprise has been cancelled. But that will unlikely to happen in the near future. But I do want to see the ratings on the first episode of season three.

I expect them to be quite low, lower then current.