Weekend watchin'

(Credit: Vivian Zink/ABC Studios)

The end of the week also brings us the end of the season for several good (and plenty of not-so-good) shows. Ah, parting is such sweet sorrow…

Friday, May 8
What: "Ghost Whisperer"
When:  8 p.m. ET/PT on CBS.
Why: Friday may be the season finale of “Dollhouse,” but since no one seems to be watching anyway, is a half-hearted buh-bye all that necessary? Besides, this week's “Ghost Whisperer” is all about vampires (thanks to “Twilight” and “True Blood,” bloodsuckers are the new Blackula). Melinda gets ready for her wedding day and helps a girl who believes she is being visited by vampires. Any show that can combine weddings and vampires is gold in our book.

Also on Friday: "Prison Break" at 8 p.m. ET/PT on Fox; "Dollhouse" at 9 p.m. ET/PT on FOX; "Numbers" at 10 p.m. ET/PT on CBS.

Saturday, May 9
What: "Saturday Night Live”
When: 11:30 p.m. ET/PT on NBC.
Why: Justin “SexyBack” Timberlake hosts for the third time. His past "SNL" hits—like his rendition of Beyoncé’s “Single Ladies” (performed with Sasha Fierce herself!) and his duet with Andy Samberg about a really special kind of present—became instant classics, so we've got high hopes for Mr. Biel. [Musical guest Ciara.]

Check out these promos this week's "SNL":

Also on Saturday: "Harper's Island" at 9 p.m. ET/PT on CBS.

Sunday, May 10
What: "The Celebrity Apprentice" season finale
When: 8 p.m. ET/PT on NBC
Why: The finale of Donald Trump’s guilty pleasure series sets an epic battle between Joan Rivers and archenemy Annie Duke as they enlist former contestants for a final, winner-take-all task. Rivers has compared Duke to Hitler this season (twice!), so expect some serious insult-hurling.

Also on Sunday: "The Amazing Race" at 8 p.m. ET/PT on CBS; "Desperate Housewives" at 9 p.m. ET/PT on ABC; “Brothers and Sisters” at 10 p.m. on ABC.