At the UNSC base, Dr. Miranda Keyes hosts a bit of an impromptu meeting with some of the Spartans, where she interrogates them as to why Chief is so special. They don't really have any decent answers, as one simply says it's because "he's the Master Chief." Afterward, Keyes tests out each Spartan with the keystone to see if they're able to have the same powerful interaction that Chief can. Kai comes in to do her test, and after taking off her helmet, Keyes sees that she has dyed part of her hair red with her own blood (Pinterest hack?). Though nothing happens when she touches the keystone, she gives a lengthy speech to Keyes about how she should stop treating the Spartans like machines, as they have much more to give to the world.
At Chief's old house, the group wanders around, looking for hints of, well, anything. Chief then asks Cortana to assemble a rendering of what his old house looked like, which she shows him on his heads-up display. Though she has trouble recreating his room due to the damage, he's able to get himself into a vision that reveals more about the house. He watches on as his young self draws something, showing a hole in the ground that leads to an underground cave that holds the keystone, which his younger self touches. However, when he flashes to his mother, he sees Dr. Halsey as if she were his mother. That quickly snaps him out of the vision, after which he promptly leaves the house.
Outside of the house, Dr. Halsey expresses her concerns to Chief about the fact that he's having visions outside of the keystone. He then admits that he saw her in his vision, though she dismisses ever being at his home, claiming that visions get muddled over the years.
Back at the UNSC base, we finally reach the moment I've been waiting for: the reveal of our old buddy, The Needler, which Kai appropriately fangirls over. After she says the word for "Needler" in the Covenant language, it sparks Keyes' imagination, prompting her to ask the other Spartans about the other words they know from the language.
On Madrigal, we cut over to Vinsher, where we get more of a close-up view of him, as he's smoking a cigar and hanging in a remote cave pool. In speaking with Franco, an assassin, he brings up Kwan specifically, whom he believes will be trouble for them. Right as he's saying this, Kwan and Soren are approached by men with knives who attempt to kill them for the reward, though her aunt swoops in and calls it off. Vinsher then instructs Franco to "take care" of her.
After inputting the new Covenant words into the system, Keyes has a chat with the Spartans, who tell her a bit about their past training. For example, they were all given pets and then given a task to complete. The side that won the task got to keep their pets, but the other side was then forced to eliminate them—a task that came as a major shock to Keyes.