EXCLUSIVE: Corbin Bernsen (Psych) and Alexis Valdés have been tapped for roles opposite Woody Harrelson and Justin Theroux in The White House Plumbers, HBO’s five-part limited series that revisits one of the biggest political scandals in American history, Watergate. The series, now in production, hails from Veep executive producers Alex Gregory, Peter Huyck, David Mandel and Frank Rich. Created