Brothers & Sisters' Walker family is expansive, with the siblings, their significant others and more bringing drama, comedy and intrigue to the fore each week. On Sunday (ABC, 10 pm/ET), a new Walker sibling will add a twist to the mix, arriving after his existence was discovered earlier this season. A product of an affair, Luke Grimes' (All the Boys Love Mandy Lane) edgy Ryan Lafferty lost his mother, and now faces fresh loss when he learns the truth about his past. TVGuide.com sat down with Grimes to find out what's behind the new sib's brooding demeanor, how the family reacts to his arrival and what he thinks of fans' mixed reactions to his casting.
Full Interview Here.