We flash to the three of them carrying out their tasks. Calleigh notices a hole whose diameter catches her attention, so she focuses on that, then goes to Alexx to get an impression of the pilot's chest around the puncture wound. Speedle discovers that Christina has a cat -- pissed off, as you would expect after God knows how many days of no food. Delko just kind of stares at the engine. I get the feeling they're setting up Delko to be the Nicky of this show. Then we see all of them finding the evidence to support Horatio's hypothesis: Calleigh finds a bolt that explains the hole in the man, Delko finds a red fiber in the engine, and Speedle finds a slip for an express delivery.
Back to Speedle reporting to Megan and Horatio that Christina left none of the usual premeditated suicide signs, i.e. a note, retrieved dry cleaning, extra food for the cat or a shrine of personal items. In addition, she also had a full refrigerator, phone calls to return, and other signs that she was planning on returning from D.C. that night. There goes Megan's theory on suicide. We then check in with Calleigh, who tells Caine how the pilot died: metal stress leading to loose bolts. In his words: "A rivet runs through it." Calleigh talks about the plane ripping itself apart, and Horatio says, "That's what brought the plane down, right?" Cue Delko's attempt at gallows humor: "No, actually, the shoe hit the fan." That's right, ladies and gents; one-half of a $450 pair of red suede shoes brought down an airplane. A shoe. Not a goose, a heron, an albatross, or something with a) actual heft and b) better odds of being in the air, but a shoe. Just in case we missed Christina falling out of the plane the last few times, we see it again, then follow the shoe as it flies into the engine and causes a shower of sparks. This is not enough for Caine, so he hauls them all into a group reconstruction of the scene.