* THE X-FILES. 10 p.m. Sunday, Fox 29. Moves to 8 p.m. Mondays beginning the following night. The show's six-episode reboot gets a post-football launch as a cable TV conspiracy theorist (Joel McHale) brings together Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) to look into something. It's not a great episode, but it sets up the somewhat better one that's airing Monday.
* MADAM SECRETARY 8 p.m. Sunday, CBS3. The show returns after last month's cliffhanger with Secretary of State Elizabeth McCord (Téa Leoni) trying to save the Russian peace deal. Oh, and there's some emergency aboard the International Space Station that's going to be her problem, too. Because the woman never sleeps.
* MASTERPIECE: DOWNTON ABBEY. 9 p.m. Sunday, WHYY12. One of the more precious jewels in PBS' crown begins its sixth and final season. Who'll get married before it's all over? Who'll find a new career? And will Lady Edith (Laura Carmichael) ever catch a break?
* HOMELAND. 9 p.m. Sunday, Showtime. Will Carrie (Claire Danes), last seen running into a railroad tunnel, manage to foil the terrorists' plans for a gas attack on Berlin's main train station? As Season 5 comes to an end, the danger seems all too real.
* MADAM SECRETARY. 8 p.m. Sunday, CBS3. Secretary of State Elizabeth McCord (Tea Leoni, pictured) is caught once again between a rock and a hard place. This time, she and the president (Keith Carradine) try to stave off World War III even as McCord's secret agent/theology professor husband (Tim Daly) tries to get his confidential informant out of Russia.
* SINATRA 100 - AN ALL-STAR GRAMMY CONCERT. 9 p.m. Sunday, CBS3. The Chairman of the Board will be there in spirit only, but CBS will mark the 100th anniversary of Frank Sinatra's birth six days early with a concert in Las Vegas. Among the headliners: Tony Bennett, John Legend, Garth Brooks, Harry Connick, Jr., Celine Dion, Alicia Keys, Lady Gaga, Carrie Underwood, Adam Levine and Usher.
Ellen Gray is the television critic for the Daily News and the Inquirer, and has written about TV since 1994. Her mind will go blank if you ask her to name her favorite show, because she has so many, but she would love to hear about yours.
Find her columns here.