The third episode of "Glee," which will directly deal with the death of Cory Monteith and his character Finn Hudson, is shaping up to be a definite tear jerker. The episode, titled "Quarterback," is said to be a tribute and a celebration of the late actor.

According to Hollywood Life, the tribute song the cast will sing is said to be "Seasons of Love" from the Broadway show "Rent."

"The [episode] is more of a celebration of Cory's life, and the difference he made to us and the fans of the show," a source told Hollywood Life. "As much as it will be [part of the 'Glee' season] it also feels like a stand-alone episode."

E! News reports that the episode is going to bring back several of the original cast members who are no longer with the show like Amber Riley (Mercedes), Harry Shum Jr. (Mike Chang), Mark Salling (Puck) and Jaayma Mays (Emma).

Also making an appearance for the tribute will be Dot-Marie Jones (Coach Bieste), Kurt's father Mike O'Malley (Burt Hummel) and Finn's mother Romy Rosemont (Carole Hudson-Hummel). Sources told E! that there a a few surprises in store for viewers but Dianna Agron and Heather Morris were not on the script and probably won't be making an appearance.

Finn's girlfriend Rachel Berry, played by Lea Michele, won't be in the episode until the last act but fans will get to see her sing "an incredibly powerful" song.

"We're in the middle of filming [the tribute], and it's incredibly hard," Matthew Morrison told E!. "We've mourned Cory, but now we're mourning Finn. So it's kind of like two people in that one person."

"Glee" creator Ryan Murphy had previously revealed that at first Finn was going to die of an accidental drug overdose but they have decided not to do that. Sources told E! that the tribute episode will start with the cast getting news of Finn's death but it won't be revealed how the character dies.

"We have decided that we're not going to have him pass from that," Murphy told Deadline. "Basically, what we're doing in the episode is we are not telling you yet, or maybe not at all, how that character died."

Cory Monteith passed away from a drug overdose on July 13 in Vancouver at the age of 31.

What's your best memory of Cory Monteith's character Finn Hudson? Let us know in the comments below.