8 pm/ET CBS
In the previous episode, a man died in an accident and, as his spirit stepped into the light, Jim's spirit entered the man's body. Now the man (played by David Conrad) wakes up in the hospital with amnesia. Melinda believes he is Jim, but Delia and Eli have their doubts. So, is the man really Jim or is this Melinda going through the stages of grief in her own unique way? In a series that asks viewers a lot in their suspension of disbelief, this episode asks a bit more. But if you're willing to give it, you won't be sorry. — Bill Ecklund
For more scoop, read the Ghost Whisperer producers' TVGuide.com blog. For clips, visit our Online Video Guide.
9 pm/ET Sci Fi
In a misadventure set off of Atlantis, quirky astrophysicist Rodney McKay takes cute blond doc Jennifer Keller to Earth to observe a scientific demonstration designed to help cool off the planet. If you've ever watched a single episode of the series, you already know that most grand experiments tend to go terribly wrong, resulting in our Stargate heroes having to race against the clock to save the day. Kids in the Hall alum Dave Foley and Bill Nye the Science Guy guest star. — Michael Chant
For full episodes of Stargate Atlantis, visit our Online Video Guide.
Everybody Hates Chris
8 pm/ET CW
Everybody loves Big Bird, but no one wants to be called "Big Bird." And that, unfortunately, is the cruel nickname given to the nerdy girl who asks Chris out on a date. To be polite, Chris accepts her invitation and then, to his amazement, realizes that he genuinely likes her. After all, Chris knows a thing or two about being an outsider. — Tim Holland
For full episodes of Everybody Hates Chris, visit our Online Video Guide.
Larry the Cable Guy's Star-Studded Christmas Extravaganza
9 pm/ET CMT
You might be a redneck if...you watch this show wearing cowboy boots, jeans, a T-shirt and a Santa hat. Larry the Cable Guy and Tony Orlando host this second annual Christmas shindig. Rodney Atkins, Montgomery Gentry and Emily West provide the music, and Charlie Callas, Victoria Jackson, Niecy Nash and Fred Willard perform with the hosts in sketches. Also appearing in this country-style Yuletide party are Lewis Black, Jenna Elfman, Bill Engvall, Jeff Foxworthy, Toby Keith and Blake Shelton. — Fred Mitchell
For more Larry the Cable Guy, visit our Online Video Guide.
South of Nowhere
8:30 pm/ET The N
While it's great to have choices in life, they can also be stressful. Tonight several characters are faced with the dilemma of making a big decision, including Chelsea, who must choose between Glen and Sean, and Aiden, who must decide what's next for him on the road of life. Meanwhile, Spencer must make a decision about college, and her choice could impact the future of her relationship with Ashley. — Jennifer Sankowski
For full episodes of South of Nowhere, visit our Online Video Guide.
(Disclosure: TV Guide is owned by CBS Interactive, a division of ViacomCBS.)