A very sensitive person, Nathan, 25, is highly intelligent, loving and creative but has never been particularly stable. Even as a kid he was anxious and highly-strung.
In his early teens he was diagnosed with schizophrenia and this ultimately tore the family apart. Michael responded by sticking his head under the files in his office.
Ultimately, Michael had Nathan institutionalized, never visiting him, Ryan, deeply upset by Michael's treatment of his younger brother, came through and tried to do a better job than Michael - he brought Nathan to Edward.
Nathan has struggled in Two Gardens and in ep 1, Ryan decides this is not the place for him and sets him free.
But Nathan is carrying some dreadful secrets of Momentum with him...