The Mentalist on CBS

Tuesday's tallies:

8 pm/ET
American Idol's final Season 8 sing-off delivered 23/07 million total viewers, up 6 percent week-to-week. NCIS' season-ender (poor Ziva...) netted 16.09 mil, up 210K.  Reaper's likely penultimate episode drew 1.79 mil, down 200 thou.

9 pm
The Dancing with the Stars finale tangoed with 20.12 million viewers, on par with the show's year-ago disco ball hand-out. The Mentalist concluded its freshman run with 16.84 mil, up 720K.

Fox's Glee debuted to 10.75 mil 1 and needs to resume its first season, like, yesterday! Fox notes that Glee was Tuesday night's No. 1 Twitter topic, while New Directions' version of "Don't Stop Believin" emerged as the No. 2 most downloaded song on iTunes.                       

90210's school year came to a close with an audience of 2.09 mil. 

10 pm
Lagging far behind DWTS, Without a Trace bowed out — for good — before a crowd of 11.32 mil, dropping 16 percent week-to-week.  

Crave scoop on your favorite TV shows? E-mail senior editors Matt, Mickey and Tim at mega_scoop@tvguide.com. Looking for the latest Fall TV updates? Follow TV Guide on Twitter. read more 25 Comments

The Eye ordered a full 22-episode season of Medium, slotting it after Ghost Whisperer on Fridays. As CBS entertainment boss Nina Tassler says, "If Ghost Whisperer and Numbers had an offspring, Medium would be it."

CBS also has tinkered with its Monday lineup in unexpected ways. How I Met Your Mother will now ... read more 186 Comments

Dancing with the Stars
9 pm/ET ABC
And the winner is...Tonight, we find out if Melissa Rycroft, Gilles Marini or Shawn Johnson takes home Season 8's coveted mirror-ball trophy after they each perform a final dance. Then the three of them must endure being roasted by comedian Jeffrey Ross. In addition, Lady Gaga performs, and a winner of the professional dancer contest is chosen. In the end, the "replacement," the formerly little-known Frenchman or the young Olympian gets to add Dancing with the Stars champion to his or her résumé.

Read on for previews of American Idol, The Mentalist, Glee and 90210. read more 5 Comments

Now playing in this week's Mitovich Mega Minute:

* Grey's Anatomy's Meredith and Derek soon will hit a bump in the wedding-planning road. Get the scoop on the detour, and then speculate about who it involves.

* Will Lois Lane have a front row seat for Smallville's season-ending smackdown? Actually, she may do the battling boys better! Hear what Erica Durance has to say about the finale.

* What happens when Supernatural meets The Mentalist?

Watch and discuss the new MMM after the jump. read more 4 Comments