Watch this, tape that - Weekend

It's the weekend, baby! Here's your guide to get you through:

FRIDAY
8:00
Watch this: "Ghost Whisperer" (CBS). A ghost reveals a bomb cache to Melinda, and tells her that one of the bombs is missing. Sounds like a case for Jack Bauer.
Tape that: "Who Do You Think You Are" (NBC). Celebrities trace their family roots.

9:00
Watch this: "Medium" (CBS). Allison is mugged, prompting her to take self-defense classes.
Also on: "Famous Crime Scene" (VH1). The re-enactments are sort of lame, but it's an interesting show. John Lennon's crime scene is the topic tonight.

SATURDAY
She rests.

SUNDAY
5:30: "82nd Academy Awards" (ABC). I'm not a movie fan, but I have seen many of the 10 movies nominated for the top honor. Followed by the annual "Barbara Walters Oscar Special" at 8:30.
The rest of the night belongs to CBS. Tune in for "The Amazing Race" at 8:00. The teams fly to Germany and retrace the early days of The Beatles. Stick around for "Undercover Boss" at 9:00, followed by "Cold Case" at 10:00. It's a repeat, but still worth watching.