Guest Stars Mare Winningham as Diane Mallum Will Chase as Michael Friedman Phillipa Soo as Amber Collins Ray McKinnon as Jerry Mallum Ian Unterman as Jonathan Sackler Brendan Patrick Connor as Howard Udell Raúl Esparza as Paul Mendelson Andrea Frankle as Beth Sackler Lawrence Arancio as Raymond Sackler Jaime Ray Newman as Kathe Sackler Jake McDorman as John Brownlee Cleopatra Coleman as Grace Pell Winsome Brown as Theresa Sackler Walter Bobbie as Mortimer Sackler Linda Powell as Karen Moles Alan Campbell as Dr. Paul Goldenheim Rebecca Wisocky as Cynthia McCormick Kenneth Tigar as Arthur Sackler Meagen Fay as Sister Beth Davies Adam Grupper as Purdue Lawyer Brian Keane as Curtis Wright Amy Rutberg as Alice Fisher Co Starring Deadra Moore as Karen Johnson R. Keith Harris as Martin Willis Andres Erickson as Mortimer D.A. Sackler Morgan Brown as Gregg Wood Alayna Hester as Elizabeth Ann McClung Deja Dee as Stephanie Mountcastle Vince Pisani as David Gauvin Paden Fallis as Louis Melton Serena Ebhardt as Sue Ella Kobak Van Zee Travis Smith as Eric Miller Ray Dooley as Dr. Art Van Zee Anthony Reynolds as Sheriff Kenny Alfonso as Medical Board Administrator Cory Scott Allen as Tim Mary Kraft as Dr. Deborah Leiderman Mark Cabus as Senator Kefauver Michael Silberblatt as Drug User at Bridge Nicole Burgess as New Sales Rep Jon Hayden as Senator Chris Dodd Christie Duke as Receptionist Taylor Simmons as Drug User at House