ABC's Sunday night hit, "Brothers and Sisters," is back to work on April 20th, and we joined SALLY FIELD, CALISTA FLOCKHART and PATRICIA WETTIG on the set for a sneak peek!

"It's so nice to get up in the morning and go to work," Calista says. The show re-joins her and ROB LOWE as they're trying to conceive. "We are trying to have a baby -- not in real life," she explains. "Robert and Kitty are trying to have a baby."

And will Nora (Sally) move to Washington with Isaac (DANNY GLOVER)?

"I really don't know what's happening," Sally insists. "We all look at each other and go, 'Really?'"! 

But as always, expect some drama between the Walkers. "Fights are always ready to break out between us!" Patricia promises.