This isn't the first time Lowe has walked away from an ensemble gig. He left "The West Wing" after four seasons and went on to star in his own show, "The Lyon's Den."
Rob Lowe to leave `Brothers & Sisters'
NEW YORK
His publicist says the actor is leaving ABC's "Brothers &
Sisters" at the end of the season. Lowe plays Sen. Robert
McCallister on the drama, which also stars Calista Flockhart, Sally
Field and Rachel Griffiths.