Dick Wolf Creator Matt Olmstead Creator Oliver Platt Dr. Daniel Charles Actor S. Epatha Merkerson Sharon Goodwin Actor Marlyne Barrett Maggie Lockwood Actor Steven Weber Dr. Dean Archer Actor Jessy Schram Dr. Hannah Asher Actor Luke Mitchell Dr. Mitch Ripley Actor Sarah Ramos Dr. Caitlin Lenox Actor Darren Barnet Dr. John Frost Actor Ashlei Sharpe Chestnut Naomi Howard Guest Star Brendan Hines Dr. Nicholas Hayes Guest Star Jeremy Shouldis Dr. Marty Peterson Guest Star Erin Anderson Lizzy Asher Guest Star Lorena Diaz Nurse Doris Guest Star Brigid Brannagh Cynthia Parker Guest Star Adam Bartley Ron Parker Guest Star Georgie Flores Renee Robinson Guest Star Garrett Ryan Trey Robinson Guest Star Raphael Sbarge Murphy "Murph" Costello Guest Star Mercedes Marcial Traveling Nurse Darla Reyes Guest Star Levi Olofson Miles Robinson Guest Star Derek Haas Executive Producer Arthur W. Forney Executive Producer Michael Brandt Executive Producer Peter Jankowski Executive Producer Michael Pressman Executive Producer Joanna Kerns Director Ryan Michael Johnson Writer