Katherine is the mother of Julian and Sheridan, and ex-wife of Alistair. Katherine snuck out of town years ago with Martin Fitzgerald, in order to escape Alistair’s abuse. When she left, Alistair faked her death. Katherine lived in hiding with Martin, and the two fell in love. Upon returning to Harmony, she was happily reunited with her children. However, she also had to watch Martin try to reconcile with Pilar, the wife he left behind. Katherine did her best to hold onto Martin, but was unsuccessful. Coming back from the dead runs in the family since Katherine discovered her “dead” sister, Rachel, is also alive.