Some scenes here land softly and then refuse to leave, like a song stuck in your head. The episode leans on reruns of earlier moments, which is nostalgic the first time and less so the fourth. Fightmaster enters the story, and the cast list gets a little more dangerous. Write down "Invincible, you have to come with us right now."; it will matter more than it seems. By the end you will know more about the execution than you ever planned to. It delivers, without fuss.