When does D. B. Cooper: Where Are You?! return?

D. B. Cooper hijacked Northwest Orient Airlines Flight 305 on November 24, 1971. The hijacker extorted $200,000 in ransom, asked to be flown to Mexico City, then parachuted to an uncertain fate. The FBI maintained an active investigation for 45 years after the hijacking. The crime remains the only unsolved case of air piracy in commercial aviation history.