Oh yeah, Curtis Holt. I'd almost forgot about him. He didn't actually appear in the episode, but he at least received a passing mention, which is more than he had in Blood Debts. He was a fun addition to the show in the first half of the season, and while there hasn't really been anything going on at Palmer Tech since it came back - not a surprise, as Felicity's been, er, preoccupied - it's still a bit weird that he hasn't turned up at all, either in a shot of him at work, or visiting Felicity in the hospital. We can assume that he has been, but it'd still be good to see him. More than the fact that he's an interesting character is that, at some point, he'll become the superhero Mr Terrific. If that's going to happen this season, then it needs to have him fully established as a character we care about, and that means him actually being in episodes.