when did william find out that oliver is his dad?! did i miss something because for a young boy who just found out that not only is his father in front of him but that he's also the green arrow, he doesn't look all that shocked or surprised
I don’t think you missed anything, otherwise, I missed it too. I’m assuming either William was told the truth as the reason he and Samantha had to go into hiding last season, or Chase told him (if you remember at the end of 5.20, Chase told William he knew his father.)
But if William really did just find out like that at the end of the season… it was such a high-engery and intense moment—I’m sure William was just relieved someone saved him from a psychopath and the information hadn’t really sunk in. Oliver had also just gotten his son back from a very near-death situation. He was probably more concerned with holding onto a warm body than a cold one.