In 1972 a man using the alias D.B. Cooper highjacked a commercial jet flying out of Portland, Oregon and jumped out with a parachute and $200,000 in cash. He was never seen again.

Two years ago, Lindsey Green posted a theory that Don Draper is D.B. Cooper. Since then, nothing has happened on the show that blows her theory.

Some observations and ideas (Spoiler alert):

To read the complete article, see:
Mad Men endgame theory: Don Draper is D.B. Cooper (http://boingboing.net/2015/05/07/mad-men-endgame-theory-don-dr.html)

To read the earlier E-Sylum articles, see:
D. B. COOPER LOOT (www.coinbooks.org/esylum_v05n48a09.html)
D. B. COOPER CASH STASH FOR SALE (www.coinbooks.org/esylum_v10n06a11.html)
PCGS CERTIFIES BRIAN INGRAM'S D.B. COOPER LOOT (www.coinbooks.org/esylum_v11n08a38.html)