They had to walk all the way back home through all the chaos that the EMP caused in the streets. When the 1st wave hit ten days after the Arrival, he went to Cassie's school to pick her up. At first, he debated with Cassie that the Others might be there to 'save' them.
He and his wife decided to stay home and try to keep going about their lives like normal unlike a few other people around them were doing (running away, packing everything up, etc.) He explained that they didn't feel safe being in such densely populated towns but reasoned that they were as safe as anywhere for the time being. Oliver Sullivan was one of the people excited to learn about The Others when they first arrived. Oliver with his family watching the news about The Others Fifteen years from that moment, he would come to name his daughter after that constellation. The one that really had his eye was the constellation of Cassiopeia.
He especially was taken by the constellations. As a boy, Oliver went on a trip to a planetarium where he lost himself at the display of stars.
