‘Shadowhunters’: Katherine McNamara cast as Clary Fray in ‘Mortal Instruments’ TV series. May 06, 2015 | 4:04 p.m. “The Mortal Instruments” TV series “Shadowhunters” has found its lead, casting Katherine McNamara as heroine Clary Fray. In the TV series, Clary is an 18-year-old art student whose future is derailed when she finds out on her birthday that her life is a lie.