Tonight's 6:30 national news on ABC ws the final broadcast of Charles "Charlie" Gibson.

It was a weeklong goodbye, as Gibson said, "you may have heard a time or 6", with Gibson on each broadcast since Monday, sharing different memories of his long farewell.

Gibson, you'll remember, came in to the anchor job when ABC News was in trouble. The network had replaced the late, great Peter Jennings with two anchors -- Bob Woodruff and Elizabeth Vargas in 2006. But Woodruff was badly injured by an IED in Iraq, and Vargas got pregnant, and had to take a leave. In disarray, ABC pulled Gibson off of "Good Morning America," a gig, ironically, that was supposed to be temporary for he and Diane Sawyer.

Charles Gibson announced today that he is retiring from the top anchor spot at ABC's "World News" at the end of this year. Diane Sawyer will be taking his place. 

Gibson became the anchor in 2006 after the death of Peter Jennings. Gibson says he'll stay with ABC and will make occasional contributions. "World News" currently trails NBC's "Nightly News with Brian Williams" in the ratings.

Sawyer is pretty much considered the savior of "Good Morning America," so it'll be interesting to see if their ratings slip when she leaves. GMA is my personal favorite (by a mile) when it comes to the morning shows, and Diane is one of the reasons. I think she'll be great at "World News," but I'll miss her on GMA. 

Adrienne, on the other hand, "can't stand that woman." She doesn't like the "breathiness" of her delivery.

Where do you fall? On Team Diane or Team Charlie? Or will you stick with/switch to Brian on NBC, or Katie Couric on CBS? 

Chopping Block (8pm, NBC) - In the finale of Marco Pierre White's cooking competition show, the last two couples remodel their spaces, plan their menus, and prepare food for opening night. NBC did not renew this show for next season.

Stealing Lincoln's Body (9pm, History) - The unusual journey of Abraham Lincoln's body after his 1865 assassination, including a Chicago gang's plot in 1876 to steal his remains and hold them for ransom. 

Eureka (9pm, SyFy) - After Dr. Tess Fontana reopens Section 5, objects become ambulatory and she thinks it could be the work of poltergeists.

Over a Barrel: The Truth About Oil (10pm, ABC) - Charles Gibson hosts a primer on the oil industry and how it works, and looks at the future for alternative energy sources.