Short answers, pulled from the story.
Oswine was murdered by his cousin Oswiu in 651, ending decades of conflict between Bernicia and Deira. This violent act unified the two kingdoms divided roughly around the River Tees.
Aidan founded the monastery at Lindisfarne in 635 based on practices from Iona in Scotland. Oswald later moved the bishopric from York to Lindisfarne, establishing it as the religious center of Northumbria.
A band of Vikings attacked the monastery at Lindisfarne in 793, marking the beginning of sustained Norse aggression against Northumbria. The Community of St. Cuthbert wandered for a hundred years after Halfdan Ragnarsson attacked Lindisfarne in 875.
Ten kings ruled Northumbria between 737 and 806, all of whom were either murdered, deposed, exiled, or became monks. Of twenty-five kings before Danish rule, just four died of natural causes.
King Edwin was baptized by Paulinus in 627, becoming the first Northumbrian ruler to convert to Christianity. Shortly after his baptism, many subjects followed him, only to return to paganism when Edwin fell in battle against Cadwallon and Penda in 633.