It's on wednesday nights at 8 pm. Wild show. Stark, brutal death scenes, good plot lines, main hero is cool as hell. one of the best "superhero" TV shows ever made.
I've never sceen smallville so i don't know if it's similar but these two images probably answer that question
from "Arrow" :
rich vigilante coming back home after being shipwrecked for years to mangle evil dudes in his city
goofy white boy.