The only subplot of significance is that of Taub (Peter Jacobson), who the writers have been especially generous to lately. Taub avoids Rachel's (Jennifer Crystal) calls, as she is his soon to be ex-wife, whom he is still very fond of, and isn't sure how to break the news to Rachel that the object of his fling is now pregnant. And that is all this new girl is to Taub - a fling. She may be carrying his child, and that may make Taub determined to force a relationship that isn't there for the sake of the kid, but he is not shown to especially care about her in the series at this point. By contrast, Taub cares a great deal about Rachel, and while his avoidance may seem cowardly, he genuinely does want to spare her feelings.
And then Rachel shows up to drop the bombshell. She, too, is pregnant. By the look on her face, a baby makes a difference in her relationship with Taub, and she is there to take him back. Despite all of the things the pair have gone through, they are going to be parents, and that matters more than the rest of it. That tune may quickly change when the other woman enters the picture. Taub can't keep one of his children a secret. If he has to choose, he will pick Rachel. But he can't just abandon his other kid, either. This is a messy, complicated situation that guarantees Taub continued focus next season.
House will return for its eighth, and likely final, season next fall on FOX, sans series regular Lisa Edelstein. Be sure to tune in!