“Six Feet Under” (8 p.m. Sunday, HBO) wraps up its fifth and final season with an expanded 75-minute episode. Unlike most series finales, this one delivers and will certainly remind viewers of all the elements that made “Six Feet Under” so unique, rewarding and, at times, exasperating.

Not to give too much away here, but “Six Feet Under” concludes with each character facing life (and the afterlife, it seems) with a mixture of dread and anticipation. Brenda’s baby girl arrives prematurely, and the departed Nate appears frequently to give voice to her most dire fears. Claire receives an exciting job offer in New York, but for her, Nate’s apparition serves as an encouraging sign – a message from beyond the grave to seize life’s opportunities.

The expanded episode concludes with a narrative trick that is both daring and gimmicky, and that should certainly generate water-cooler conversation among the show’s faithful following. It also ends the series with an emphatic nail in the proverbial coffin, precluding any hope for a spin-off or sequel. And you can’t ask much more of a series ender.

¢ David Ensor is host on “Dead Wrong: Inside an Intelligence Meltdown” (7 p.m. Sunday, CNN), examining how the CIA provided the Bush administration a “slam dunk” case for the existence of Iraqi weapons of mass destruction – evidence that was used to justify a pre-emptive invasion of a sovereign nation. As we all know, the information turned out to be false.

Today’s highlights

¢ Al Pacino, Robin Williams and Hilary Swank star in the 2002 thriller “Insomnia” (7 p.m., AMC).

¢ Scheduled on “48 Hours Mystery” (9 p.m., CBS): the parents of a juvenile killer blame his prescription medication for his violent behavior.

Sunday’s highlights

¢ Scheduled on “Dateline” (6 p.m., NBC): young victims of Uganda’s civil war.

¢ Geoffrey is hesitant about “Hamlet” on “Slings & Arrows” (7 p.m., Sundance).

¢ “My Kind of Town” (8 p.m., ABC) visits Mt. Horeb, Wis.

¢ “Inside 9/11” (8 p.m., National Geographic, concludes Monday) presents a detailed timeline of gathering terrorist threats to America from Islamic extremists from the 1980s to 2001.