7. LOST
(2004-2010)
There was never going to be any way to wrap up every last hanging story line from six seasons of serialized Island mayhem, but Lost's two-and-a-half hour finale proved to be a high-energy epic romp, even with plenty of questions unanswered. The revelation that the Sideways world was a purgatory-ish afterlife led to a parade of tear-inducing reunions (Charlie and Claire, plus Aaron!), while the Island story line ended with a final showdown between Jack and Smokey. We dare you not to cry at the final moments, with their shot-for-shot callback to the very first scene of the series. Darren Franich
Image Credit: Mario Perez/ABC
''The Office'' signs off tonight; let's see if its last episode meets the standard of these all-time finest TV farewells, from ''Friends'' and ''The Shield'' to ''Mary Tyler Moore'' and...our No. 1 of all time