If Arrow took place in a perfect world — or even over on The Flash or Supergirl — then Oliver would leave Slabside behind right before Diaz crosses the threshold, never needing to meet him ever again and instead heading off into the sunset to retrieve William with Felicity at his side.
Now that Diaz has been arrested, there’s really only one place Arrow could send him: Slabside.
Yes, Ricardo Diaz is headed to federal prison, and the promo for the next episode proves that we’re not in for a peaceful and violence-free hour of television.
Of course, his capture coincides with news that Oliver is going to be sprung from the clink.