While Astrid stays behind to try to improve the tape's playback, Walter, Peter (Joshua Jackson), Olivia (Anna Torv), and Etta (Georgina Haig) travel to the designated location.
Edwin discovers that, sometime in the past, the Observers took away a man, identified only as "Donald," who had retrieved red-colored rocks from the mine with the intention of delivering them to a "scientist from Boston."
Walter begins to prepare a protective suit to keep the effects of rapid calcification from affecting whoever wears it, allowing them to recover more rock samples.
With time short, the only way to get the right materials for the suit is to barter with another nearby refugee camp, a step Edwin is reluctant to take; he would rather see the Fringe team leave instead.
As the Fringe team escape with the mineral and return to the lab, abandoning their van to deceive the Loyalist forces, River takes over for Edwin as the recorder, writing a eulogy for his father.
An estimated 2.64 million viewers watched the episode, and earned a ratings share of 1.0 among adults aged 18 to 49, to rank fourth in its timeslot.
[4] IGN's Ramsey Isler also thought the episode's storyline was lacking, and that it could have been more exciting, but felt the supporting cast was strong and that it told a good emotional story.