HBO is rounding out the cast for its upcoming limited series The White House Plumbers. Chilling Adventures of Sabrina alumna Kiernan Shipka, Ike Barinholtz (The Mindy Project), Yul Vazquez (The Outsider), David Krumholtz (The Deuce), Rich Sommer (Mad Men), Kim Coates (Sons of Anarchy) and Liam James (Psych) join Woody Harrelson, Justin Theroux, Domhnall Gleeson and Lena Headey in the five-part series that revisits one of the biggest political scandals in American history, Watergate.