James Gandolfini

As the TV season comes to a close, TV Guide Network takes a look back at the best finales of all time.

From the cut-to-black ending of The Sopranos to the vaguely spiritual final act of Lost, Jason Alexander counts down the most unforgettable finales. The special also features interviews with stars of these talked-about finales, including Will & Grace's Megan Mullally, Dallas' Patrick Duffy and Larry Hagman, M*A*S*H's Mike Farrell and The Shield's Walton Goggins.

TV's Most Unforgettable Finales airs Sunday at 8/7c on TV Guide Network.