SERIES FINALE: After eight seasons – two terms, as Eva Longoria said Friday night on Real Time with Bill Maher – Marc Cherry’s series presents its final two hours. It’s been said, a lot, that this show’s best years are long behind it, but I’m been watching throughout, and that’s not so. This season’s story lines with Felicity Huffman’s Lynette (separated from, but still loving, husband Tom), Marcia Cross’ Bree (falling off the wagon and into the beds of multiple strangers), and Gaby (finding a new career as a personal shopper) have all been clever, and tonight’s finale offers a nice chance to say goodbye to a series that, for a while, was the hottest show on TV. Cherry and company named each episode after a Stephen Sondheim song or lyric, and the Cherry-written final hour is a nod to both a song from Sunday in the Park with George and the title of the composer’s new career-overview book: “Finishing the Hat.”