In this clip from the Brother & Sisters finale, the family is re-united with Tommy (Balthazar Getty) and everyone goes running in for a hug... except Kevin.
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In this clip from the Brothers & Sisters finale, Nora admits that the reason Tommy left and joined a cult is because Nora shamed him.
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In this clip from the Brothers & Sisters season finale, when Kevin finds out that Kitty and Robert's marriage is in trouble, he gives Robert a heads up.
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In this first clip from the Brothers & Sisters season finale we find out that Nora has found Tommy in Mexico... and he's in some sort of cult!
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Brothers & Sisters Season 3 Episode 24 Quotes

Robert: You want a separation, you got it. Because I'm done. I'm done chasing you and I'm done trying to figure out what you want. If you want to move to Pasadena, move to Pasadena. You want to take Evan with you, we'll work out the terms of the custody. You want to tell everybody in the world that we're separating, do it.
Kitty: Robert.
Robert: You just closed the deal. Have Kevin work out the details, whatever you think is fair. And for the record, I didn't come down here because Kevin told me to. And I wasn't fighting you on the terms of the separation because I wanted to be Governor. I was fighting you on the terms of the separation because I believe that if you move out of our home, that you will never come back. You want a separation, this is what one looks like.

Nora: Maybe I learned something over the last few days.
Kevin: Really? The only thing that I learned is that vegan food gives me the trots.