Colonel Nash is the father of Ellie Nash, and husband of Caroline Nash. He is a colonel in the Canadian Army. He is known to be formerly in a peacekeeping meeting in Kabul. Because he left, Ellie became depressed, and turned to cutting. He is portrayed by Daniel Lévesque
In Whisper To A Scream, he tells Ellie that he will be fine in Kapul, and reassures her that her mother is under control. He comforts her, and kisses his wife goodbye. He tells Ellie to always keep her smile. As he boards the bus, he waves goodbye to his family, who smile and wave back at him. He later calls Ellie and reveals that he arrived safely in Kabul. When he asks about her mother's condition, Ellie chooses to lie to him and says that she is doing fine, not revealing that she had become an alcoholic. His departure was part of the reason Ellie's depression formed, which led to her begin cutting.
In the Degrassi Goes Hollywood, Caroline tries desperately to get ahold of Ellie to tell her to visit her father, but has little success. However, Ellie finally visits her father, who is at the hospital, because he is suffering from Post Traumatic Stress Disorder after his tour in Afghanistan. The two tearfully hug each other in happiness, after finally seeing each other after so many years.