The missing portrait of Dr. Andersen takes us on a journey into the perils of memorialization and who gets to be remembered. Dr. John Scott Baird, Dorothy Andersen’s biographer, looks for the portrait, and Drs. Nientara Anderson and Lizzy Fitzsousa, former medical students at Yale University, explain how “dude walls” — the paintings of male scientists that line institutional walls — can have an insidious effect on those who walk past them every day. And we go back to Columbia University to give you an update on the hunt for the missing portrait.