26 Season Finale Scoops: Spoiler Alert!

The Big Bang Theory wraps up its latest season on Thursday, May 15 and will feature Sheldon meeting a psychic.

The Arrow finale airs on Wednesday, May 14 and fans should expect to see a few familiar faces pop up.

The Blacklist closes Season 2 on Monday, May 12 with the team reacting to a major death and with viewers learning more about Berlin.

Bones will end Season 9 on Monday, May 19 with David Boreanaz as director and Booth's future with the FBI in question.

Castle and Beckett will engage in their final investigation on Monday, May 12 on an episode titled "For Better or Worse." Hmmm... what could that be referring to?

Sophia Bush will cross back over to Chicago Fire for the May 13 finale.

Look for Criminal Minds to bow out with a two-parter that concludes on May 14 and features the BAU heading to Texas.

Treat Williams guest stars on the CSI finale, which airs May 7 and features Brass facing a major decision.

Hardy and Joe actually come together on April 28 to stop Mark and Luke from seriously terrible.

Brittany will appear on the May 13 finale, which Ryan Murphy has teased will shake Glee up BIG time heading into the final season.

The Good Wife Season 5 ends on Sunday, May 18. Michael J. Fox will still be around as Louis Canning and an old case will cause problems for Alicia.

Grey's Anatomy fans will say goodbye forever to Cristina Yang on Thursday, May 15. Bring tissues.

Monroe and Rosalee get married on the Grimm finale, which airs on Friday, May 16.

Hawaii Five-0 draws to a close on Friday, May 9. Look for Wo Fat to return... and Nick Jonas, too!

Marvel's Agents of S.H.I.E.L.D. ends on Tuesday, May 13. Expect explosions, chases and a big-time death.

Lisbon will face multiple questions on The Mentalist finale, airing May 18: Will she move to D.C.? Will she get engaged to Pike?

Modern Family airs a two-part finale that is centered around Cam and Mitch getting married.

The NCIS finale (May 13) will be a special tribute to Ralphe Waite, as Gibbs heads home due to news of his father passing.

Callen and Sam must find a submarine on Tuesday, May 13; a submarine with a lot of cocaine in it.

The gang goes on a romantic getaway on May 6, one booked by Nick and Jess before they broke up.

Michael Socha will be a series regular on Once Upon a Time Season 4. Will he therefore show up on the two-hour, May 11 finale?

The French Quarter will be left in chaos on Tuesday, May 14 after one faction makes a very aggressive move against the others.

One character will be in jail and another will die on the May 11 finale.

Sam, Dean and Castiel will take the fight to Metatron on the Supernatural finale. Airs Tuesday, May 20.

With his wife as Alan's fiancee, Brad Paisley will guest star on the Two and a Half Men finale (May 8).

A couple familiar faces will show up on The Vampire Diaries May 15 finale, which will shake up The Other Side change the series for good.