After the hijacking of Northwest Orient Flight 305, we are left with a staggering number of questions. Where did this hijacker disappear to? Who is he? Is he dead somewhere?! The FBI begins their biggest manhunt of the 20th century, and along the way, they'll find more than they bargained for. Also, a little boy found something that the FBI couldn't. Good job, kid! To hear all about the initial investigation into who D.B. Cooper is (and whether or not he's even alive,) tune into this weeks episode with Caroline and Trevor.