Two psychologists from Iowa State University join the program. Their whose research seeks to improve accuracy in witness and suspect testimony in the criminal justice system. Professor of psychology Zlatan Krizan discusses how sleep deprivation may influence confessions and witness statements, while associate professor of psychology Andrew Smith explains how video recording of eyewitness suspect lineups could improve confidence in those practices and assist in criminal trials. Later, University of Iowa Carver College of Medicine researcher Colin Kenny explains how using zebrafish in research can help to better understand a rare eye cancer and improve treatment.