March 20, 2010 02:41:40 GMT
In a flashback episode, a secret that William's nemesis, Dennis York, holds about the Walker clan will be exposed.
ABC has released a bunch of stills from the flashback episode of "Brothers & Sisters" which will air on Sunday, April 11. The Walker siblings are portrayed by younger actors in this special episode which takes place in 1986 when William Walker was alive and well.
Called "Time After Time", the episode will be two-hour long and divided into two parts. Executive Producer David Marshall Grant told EW that the episode will go back to three different time periods and expose a "shocking and transformative" secret about the Walker family.
Cody Longo is portraying young Tommy after Joe Jonas backed out of the project. Kay Panabaker is Kitty, Anna Wood is Sarah, Kasey Campbell is Kevin and Dylan Thomas Larsen is Justin. The photos of the Walker parents are not yet released but allegedly Nora will be portrayed by either Rachael Leigh Cook, Courtney Ford or Nora Zehetner.