“LUTHER” – Idris Elba is back on the beat as tormented Detective Chief Inspector John Luther. The final four-part chapter of this blistering British drama series is darker than ever as Luther splits time between two horrific crime investigations. But, hey, on the bright side, he gets a new girlfriend (Sienna Guillory). 7 p.m. Tuesday, BBC America.
SUNDAY: Will you have an appetite for this season’s new TV shows? Get a sample taste tonight via the “ABC Fall Preview Special Presented by The Chew.” Just be careful to guard against indigestion. 7 p.m., ABC.
SUNDAY: “TV’s Funniest of the Funniest: A Paley Center for Media Special” is a long-winded title for a clip show in which sitcom stars – including Michael J. Fox and Betty White – talk about their favorite moments in TV comedy. 9 p.m., NBC.
SUNDAY: Ryan Seacrest, Paula Abdul, Backstreet Boys, Lee Ann Womack and Matthew Morrison are among the celebrities scheduled to appear on the “MDA Show of Strength Telethon.” The muscular dystrophy fundraiser, once an all-day affair, is now down to two hours. 9 p.m., ABC.
MONDAY: Brace yourself for another hilarious verbal beat-down as James Franco takes the hot seat for the “Comedy Central Roast.” The guest list includes Bill Hader, Jonah Hill, Sarah Silverman and others. 10 p.m., Comedy Central.
TUESDAY: “Cold Justice” is a new true-crime series from producer Dick Wolf (“Law & Order”). It follows former prosecutor Kelly Siegler and veteran crime scene investigator Yolanda McClary as they attempt to crack long-unsolved murder cases in small towns across the country. 10 p.m., TNT.
WEDNESDAY: All good things come to an end – yes, even “Futurama.” The loony sci-fi cartoon series caps things off with the long-anticipated wedding between Fry and Leela, along with plenty of slapstick violence, of course. 10 p.m., Comedy Central.
WEDNESDAY: “It’s Always Sunny in Philadelphia” kicks off its ninth season and helps FX to launch a new, offshoot network. They’re surely raising a toast to that down at Paddy’s Pub. 10 p.m., FXX.
WEDNESDAY: Love is all around for tonight’s “Hot in Cleveland,” which reunites five actresses from “The Mary Tyler Moore Show” – Valerie Harper, Cloris Leachman, Georgia Engel, Betty White and Mary herself. 10 p.m., TV Land.
THURSDAY: It’s more shlocky fun as “Ragin’ Cajun Redneck Gators” take to the screen. Some toxic moonshine turns normal alligators into scary mutants, which then wreak havoc on the Louisiana bayou. 9 p.m., Syfy.
FRIDAY: Queen Latifah hosts and narrates “Teach.” It’s a two-hour special that explores America’s education system through the eyes, minds and hearts of four public-school instructors. 8 p.m., CBS.
SATURDAY: Get a big dose of crazy on “David Tutera: Unveiled.” It’s a reality series that follows the event planner as he organizes epic, over-the-top parties for bratty bridezillas and ditsy divas. 9 p.m., WEtv.