ABC and NBC will each be rolling out a multinight competition show this week. ABC's Duel (8 p.m. WMAR, Channel 2) is described as a high-stakes, tournament-style trivia challenge, with one of its 24 contestants guaranteed to win the jackpot, potentially more than $1.5 million. Meanwhile, NBC is tuning up Clash of the Choirs (8 p.m. WBAL, Channel 11) The premise: five musical stars - Michael Bolton, Patti LaBelle, Nick Lachey, Kelly Rowland and Blake Shelton - return to their respective hometowns, where they audition gifted amateur singers they can meld into a choral ensemble.
OLIVE, THE OTHER REINDEER -- 8 p.m.-9 p.m., WUTB, Channel 24 / Little dog Olive wants to help Santa deliver presents when Blitzen the reindeer is injured. MNT.
TWO AND A HALF MEN -- 9 p.m.-9:30 p.m., WJZ, Channel 13 / Charlie (Charlie Sheen) behaves strangely after an evening with his mother. CBS.
GREAT PERFORMANCES -- 9 p.m.-11 p.m., MPT, Channels 22/67 / Tony-winner Audra McDonald stars in a new production of The Rise and Fall of the City of Mahagonny, with Patti LuPone. PBS.
K-VILLE -- 9 p.m.-10 p.m., WBFF, Channel 45 / Cobb (Cole Hauser) and Boulet (Anthony Anderson) begrudgingly take a New York reporter on a ride-along. Fox.
NOTES FROM THE UNDERBELLY -- 9:30 p.m.-10 p.m., WMAR, Channel 2 / Eric (Sun- krish Bala) must organize a baby party without ruining friendships. ABC.
JOURNEYMAN -- 10 p.m.-11 p.m., WBAL, Channel 11 / Dan (Kevin McKidd) travels in time to an RV with a woman and her son inside, hanging off a cliff. NBC.
MODERN MARVELS -- 8 p.m.-10 p.m., History / The history and production of cold cuts.
THE MISSING YEARS OF JESUS -- 9 p.m.-10 p.m., National Geographic / Scholars try to find facts about the life of Jesus Christ between the ages of 12 and about 30, years that biblical references do not cover.
SAVING GRACE -- 10 p.m.-11 p.m., TNT / The squad prepares for a murder suspect's hotshot attorney.
THE VIEW -- Contest winners; guest co-host Margaret Hoover. (11 a.m., WMAR-2)
OPRAH WINFREY -- Audience members ask questions of Dr. Oz. (4 p.m., WBAL-11)