Isaac Breland is the head of the CIA's Afghan Group division. He has a Masters in Theology from Notre Dame. He lost his first wife to cancer and then remarried.
He has three kids - one of them, his daughter Kimberly, babysits for Ted Paaswell. Kimberly believes her father works for the US Department of Agriculture, and has fond memories of gardening with him when she was a little child. He ultimately tells her the truth about his job.
In the Season Five finale, Philip and Elizabeth plan to return to Russia with their kids, but when they learn of his promotion they decide to remain in the US.