Tom Fontana Creator Julie Martin Creator Matthew Modine Professor Jake Macklin Actor Milo Ventimiglia Richard Thorne III Actor Penn Badgley Owen Gregory Actor Tiffany Dupont Sara Gregory Actor Corri English Natalie Dykstra Actor Ernest Waddell Lee Rasmussen Actor Victoria Cartagena Zoe Lopez Actor Audra McDonald Professor Carla Bonatelle Actor Peter Gerety Dean Harold Harper Actor