Misfits season 2

The whole group is waiting for the community service to reach it’s end. Meanwhile an unknown man who wears a mask continues his sudden appearances in the dangerous situations. He always shows up when the boys and the girls from the gang need his help a lot being in rather dangerous situations. The most scaring and strange thing about him is that he always acts like he is aware about the thing that have not yet happened. Thanks to him they discover Nathan is alive and a bit later Nathan is saved by him again when becomes vulnerable. Alisha avoids a dangerous attack of a mugger thanks to a masked man. So who is that mysterious person?