Brothers and Sisters alum Dave Annable has been cast opposite Renée Zellweger, Jane Levy and Blake Jenner in What/If, a social thriller anthology drama series for Netflix. Joining the Mike Kelley series in a recurring role is Louis Herthum (Westworld). Written by Kelley, directed by Phillip Noyce and produced by Page Fright, Atlas Entertainment and Compari Entertainment, a division of Robert Zemeckis' ImageMovers, in association with Warner Bros…