For a show which has spent the first 10 episodes of a 13 episode season trying to figure out who killed a girl, "Missing" is very random. It focuses on only Linden and Holder and aside from the beginning and end, stays away from Rosie Larsen. We learn a lot more about Linden and Holder in the process, but I have to wonder why this episode couldn't come earlier, preferably before the show burned several episodes pointlessly pursuing Bennet. In the grand scheme of things, the episode probably won't matter much, and the writers could have put the details of Linden and Holder's pasts into the middle of previous episodes (like Game of Thrones does effectively), but it's a serviceable episode of television.
I don't think what we learned in the episode is important enough to recap, though I greatly appreciate that we finally learn who Reggie is--but the interaction between Linden and Holder was the strongest its been and following them around for an entire episode while learning about them wasn't bad. Again, the writers tried to lead us on, this time with the possibility of Jack dying, but it didn't happen in the end. If it did, that would surely be a twist to remember.
Score: 8.7/10