"Eaglet nine-oh-six, fly runway heading. Runway 9 left, cleared for takeoff."
"Set takeoff power. One hundred knots."
"Power is set."
"See that game last night? Dolphins are pretty good this year."
"They'll never make the playoffs without a quarterback."

Everyone looks faintly unnerved as they listen, probably because they all know what's coming. Delko explains, "The first four minutes after takeoff were normal. It gets pretty funky after that." Peter cues the recorder, and everyone hears:

"This is the captain. Our flight to Washington, D.C., is two hours, twenty minutes. The temperature is 72 degrees."
[loud noise]
"What was that?"
"We've got a light on. Could be electrical."
"Exit light is definitely on. We've got a door open."
"What the hell's going on back there?"
"Losing power."
"Got a warning light -- engine two!"
"We're losing air speed!"
"We lost number two!"
"Pull out, pull out!"
"Can't get --"

Then, static. The camera pans over everyone's faces as they listen to the disaster unfold. Horatio, who entered a deep blue funk the minute the recorder began, asks softly, "Okay, shut that off, please?" He composes himself, then says, "Something's missing." Bulletgirl III, a.k.a. Calleigh (remember her? She gets, like, less airtime than the corpses do), says, "There's no gunshot." Horatio requests a playback. They listen to the door thunk one more time. Then, per Horatio's request, Peter runs a reverse algorithm, loses the pilots' voices, and pulls up what was going on in the cabin. We then hear an angry conversation between a man and a woman:

Man: I'm not going to let you --
Woman: Get off of me!

They degenerate into sounds of struggle, and Horatio says, "Ladies and gentlemen, that's Sommer and Christina, isn't it?" Speedle nods, then pegs the door opening. We hear Christina screaming, and then only the engine. Horatio presses ahead: "How long between the door opening, and Christina's scream?" The answer: seventeen seconds. Megan and Horatio spell it out for the slow learners at home: Christina held on for seventeen seconds before Sommer pushed her out of the plane. "Now all we have to do is prove it," Horatio says. He then gives everyone their marching orders: Speedle is to go to Christina's apartment and do a full profile. Calleigh is to head back out into the swamp to examine the airframe to look for projectiles. Delko is to focus on the number two engine to see what brought down the plane.