Guest Stars Camilla Luddington as Dr. Jo Wilson Jerrika Hinton as Dr. Stephanie Edwards Debbie Allen as Dr. Catherine Avery Gaius Charles as Dr. Shane Ross Tessa Ferrer as Dr. Leah Murphy Tina Majorino as Dr. Heather Brooks William Daniels as Dr. Craig Thomas Steven Culp as Dr. Parker Ethan Embry as Dr. David Moore Marcuis Harris as Rob Mays Trever O'Brian as Bryan Greenberg Julie Mann as Paula Julia Silverman as Janet William Charlton as Jeff