"Person of Interest" will leave fans surprised about who's controlling the Machine, executive producers promised in a call last week. Reese (Jim Caviezel) and Finch (Michael Emerson) gain news allies to save the contraption, which has gone offline, at 9 p.m. Thursday on CBS.
But first, Walden (Ashton Kutcher) finds himself less interested in a 22-year-old (Hilary Duff) than in her grandmother (Marilu Henner) at 8:30 Thursday on CBS.
TV veterans Patty Duke and Meredith Baxter take part in the "Glee" season finale at 9 p.m. Thursday on Fox. "American Idol" runner-up Jessica Sanchez is here, too, as Rachel frets over her "Funny Girl" audition.
Will the "Community" season finale, at 8 Thursday on NBC, also be the series finale?
More season finales come at you Friday. The entire CBS lineup calls it a season with "Undercover Boss" at 8, "Vegas" at 9 and "Blue Bloods" at 10. Fox wraps up "Kitchen Nightmares" at 8 and "Touch" at 9. NBC delivers the "Fashion Star" conclusion at 8. "Vegas" and "Touch" will probably end their runs with these episodes. It's the end for "someone close to the Reagans" on "Blue Bloods," CBS hints; that person is murdered.
On the reality front, "The Voice" offers five hours of playoff rounds this week. Fans get two hours at 8 p.m. Monday and Tuesday, plus one hour at 8 p.m. Wednesday.
"Dancing With the Stars" has the six couples performing two dances apiece at 8 p.m. Monday. On the results show, at 9 p.m. Tuesday, Jason Derulo performs "The Other Side," and Emeli Sande delivers "Next to Me" and "Heaven."
"American Idol" presents the three finalists in performance and on visits home at 8 p.m. Wednesday on Fox. The field will be reduced to the last two at 8 p.m. Thursday. The next "American Idol" will be Angie Miller, Kree Harrison or Candice Glover.
"Survivor" reduces its field at 8 p.m. Wednesday as the CBS contest heads to its season finale next week.
In the May ratings period, the guest stars show up with regularity. Rob Reiner and Mary Lynn Rajskub visit "New Girl" at 9 p.m. Tuesday on Fox. Bill Hader stops by "The Mindy Project" at 9:30 p.m. Tuesday on Fox. Chris Carmack dips into the romantic heartache of "Nashville" at 10 p.m. Wednesday on ABC. Natalie Dormer ("Game of Thrones") starts her role as Sherlock's former lover on "Elementary" at 10 p.m. Thursday on CBS.