8 pm/ET Fox
Millionaires work anonymously — and for the minimum wage — alongside folks they don't ordinarily see in their corner offices in this feel-good reality series, which winds up a six-episode run with Gregory R. Haerr, a Salt Lake City businessman who has interests in software, real estate and aviation. Tonight Haerr adds motel cleaning to the list. (Oh, and he'll also give out at least $100,000 to somebody at the end of the show.) — Paul Droesch
For full episodes of Secret Millionaire, visit our Online Video Guide.
Million Dollar Password
8 pm/ET CBS
This past summer CBS brought back for a limited run the iconic game show, which debuted on the network in 1961, and added a million-dollar twist. Tonight it returns for another brief outing (through Feb. 1), and host Regis Philbin again asks contestants if they want to be a millionaire. William Shatner and Aisha Tyler are this evening's celebrity guests. The former Capt. Kirk supplies a lot of laughs during the hour, while funny lady Tyler proves her game-playing skills are anything but laughable. — Tim Holland
For clips of Million Dollar Password, visit our Online Video Guide.
Celebrity Rehab with Dr. Drew
10 pm/ET VH1
Season 2 wraps up with a 90-minute episode that finds Rehab two-timer Jeff Conaway center stage, due to a recent violent outburst that tests Dr. Drew's no-tolerance policy. While Jeff's prospects for graduation are suddenly up in the air, the other patients view clips of their best and worst moments — and prepare to tell Dr. Drew what they plan to do next. — Joe Friedrich
For clips of Celebrity Rehab, visit our Online Video Guide.
Faith Hill, Joy to the World: A Soundstage Special Event
10 pm/ET PBS
Backed by an orchestra and choir, country-pop star Faith Hill celebrates the holidays — and spotlights her 2008 Christmas album Joy to the World — at the Sears Centre in metro Chicago. The set features such fun fare as "Holly, Jolly Christmas" and "Santa Claus Is Coming to Town" alongside the spiritual, including "A Baby Changes Everything," "O Come, All Ye Faithful," and "Silent Night." — Jeff Gemmill
Keep the Faith (Hill) in our Online Video Guide.
10 pm/ET TLC
Romance is in the air when Kat decides to surprise her boyfriend, Mötley Crüe bassist Nikki Sixx, by redoing his recording studio, Funny Farm. Will her interior-decorating skills rock the house? Meanwhile, Emmy-winning soap stud Kristoff St. John (The Young and the Restless) stops by High Voltage Tattoo for some philosophical ink. — Karen Andzejewicz
For clips of LA Ink, visit our Online Video Guide.