Brothers & Sisters returns with new episodes on September 27.

We've already viewed a season four trailer for the series, but ABC has released an official description for the installment. Here's a summary of it:

• Kitty holds a crushing secret that will rock her family;
• Nora and Holly begrudgingly partner to throw a major engagement party for Justin and Rebecca;
• Sarah searches for new business prospects in Europe.

The network has also released the following photos from the episode, which is titled "The Road Ahead."

As for other major spoilers for Brothers & Sisters, producer Alison Schapker told Entertainment Weekly that Saul takes Ryan under his wing at Ojai this season, but:

“Saul has a secret, which is that he was there the night before Ryan’s mother committed suicide, not William. So that’ll be interesting when that comes out."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.