Jordana Spiro Dr. Grace Devlin Actor William Forsythe Constantine Alexander Actor Floriana Lima Nurse Rosa "Ro" Quintero Actor Zach Gilford Dr. Brett Robinson Actor Jaime Lee Kirchner Dr. Olivia Wilcox Actor Željko Ivanek Dr. Stafford White Actor James Carpinello Franco Actor Jesse Lee Soffer Nate Devlin Actor Wendy Makkena Daniella Devlin Actor Shohreh Aghdashloo Guest Star Javon Johnson Guest Star Laura Breckenridge Guest Star Brian Goodman Guest Star Liam Foley Guest Star Lucas Marx Guest Star Chris Agos Guest Star Karin Anglin Guest Star Josh Berman Executive Producer Rob Wright Executive Producer Michael Dinner Executive Producer