-Lucas and Lindsey's wedding (and breakup) is in this episode.

The following (credit to Taylor)

-Lucas is in a black suit with a white satan tie. Peyton is in a strapless grey dress with black beads on it.

-The ceremony starts, but Lindsey is the one to stop it. Lucas has a flashback of the tow truck scene and straight from there after it comes back to present time that is when Lindsey takes off down the isle. Lindsey literally runs away and leaves Lucas at the altar. No words exchanged .He stands there a little dumbfounded and looks quite hurt in his facial reaction. Haley runs out after her.

-We also filmed a scene where Peyton has a “dream” or it is considered a dream sequence. The extras were asked to stand right outside of the door to throw birdseed up in the air. I thought it would be Lucas and Lindsey of coarse but it happened to be Lucas and Peyton and Haley and Brooke both are there as Peyton’s bridesmaids in matching teal dresses. Peyton kisses Brooke on the cheek and her and Lucas ride away together in the Comet.

-Hilarie also filmed a short scene where she just sat in her car outside of the church “thinking” this could be when this dream comes to light.

-This is Micheala/Lindsey's last episode (but also, most likely, the last episode of the season).

-Chad filmed a shirtless scene with Michaela. It takes place after the wedding and the script called for tears.

-Chad and Micheala filmed a LL scene back at Lucas's house. After she runs out of the wedding he finally goes to look for her after a little push from someone close to him that cares. He finds Lindsey at his house and her bags are packed. She goes on to say it won't work because his heart is conflicted and he never stopped loving Peyton. She goes on to say she always knew she just didn't want to believe it herself. Lindsey quotes a bunch of lines from his book that involve the Comet. Lucas says he doesn't want her to leave and she replies "Lucas, people always leave...you out of all people should know that."

-Lindsey does read his second book. During their break-up she says his book is a love story while he tries to say it's metaphoric.

-Nathan is the person that gives Lucas the advice to go after Lindsey. He tells him to look into his heart and if she is still there to go after her. Lucas says that he still wants to be with her so Nathan tells him to go find her. Of coarse there is more brotherly love in this scene including a hug so thats something.

-After the wedding, Peyton is reflecting over the events alone in the church. Brooke comes to sit with her and encourages her to go after Lucas. Peyton then responds about how it doesn’t really matter because he went through with saying “I do.” Brooke then says something like “shut the hell up bitch!” Peyton motions upward to symbolize the fact that they are in a church and Brooke then apologizes and goes on to tell Peyton that she doesn’t need to give up. That’s the only dialogue I know of which is why I am unsure of how this scene ends. I don’t know if Peyton actually goes or just goes on sitting there. This is a very nice scene for the BP relationship. There’s loving words and hugs exchanged. Although Mark is free to edit. (I got the sense that Peyton really thought it was over when Lucas said “I do”. Like it ended their journey together for good and she was just kind of mourning her loss even though she doesn’t come across as whiny just hurt and confused.)

Information from Showfax Sides

-Scene 27
Inside the church, Lucas and Lindsey’s wedding. The kids(Jamie/Lily) are leading Lindsey down the aisle as Nanny Carrie watches from above. As Lily passes Peyton, she tosses petals into the air prompting a flashback to 409 from Peyton.

-Scene 28
409 Flashback, “It’s You, Peyton”.

-Scene 29
Peyton rises to her feet as Lindsey joins Lucas at the altar. The minister speaks and we zoom in on Peyton and Brooke, standing behind Karen, Lily, and Andy. Skills is behind Peyton and tells her “he’s got her”, reaching down for one of his beers.

Brooke walks up to the front to begin her reading, as she does this Nathan steals a glance at Haley. As Brooke reads, we flashback to clothes over bros.

-Scene 30
Brooke tells Lucas she came home to get pregnant with his child. Lucas is freaked out, asking if she’s really thought about this.

-Scene 31
The minister asks Lucas to say his vows and Peyton stands up objecting as Skills grins at her actions. She tells Lucas she’s sorry and he can’t do this because she loves him and because he fixed her car. She says that day changed everything because he changed her heart along with her car. She goes on to say two years ago he proposed to her and she was scared so she said someday. She tells him that someday is now and she loves him and pleads for him not to leave her again.

But when it cuts back to Lucas, we see Peyton imagined it all and Lucas says “I do”.

-Scene 32
Lucas slips a ring on Lindsey’s finger as Jaime whispers to Skills he has to go to the bathroom. Skills doesn’t want him to go alone, but Jamie pleads saying Lily will make fun of him and that he knows where it is. Skills agrees making him promise to come right back.

-Scene 34
Lindsey eyes her wedding band and whispers “It’s a comet.” Everyone is confused. Lucas asks what’s wrong and Lindsey says it was a comet the boy saw. She goes to recite a passage from his book about a boy who saw a comet and felt his life finally had meaning and that he waited his entire life for it to return.

Lindsey then asks when the first day he ever talked Peyton was. Lucas eyes Peyton and all eyes follow his lead putting Peyton in the spotlight. Lucas says that her car broke down and we enter a flashback of the first time Lucas and Peyton spoke.

-Scene 35
The start of the flashback from when Lucas first spoke to Peyton on that country road with her broken down car. “That’s me inside your head”.

-Scene 42
Brooke is explaining to Peyton she’s spent the last 4 years working long hours and she needs something to fill a void that success hasn’t. She wants a family. Peyton asks if she wants to marry Lucas. Brooke says no and that she wants Peyton to marry Lucas and that she just wants to a mom like her mother never was and Lucas to be the father.

Peyton tries to absorb this and Brooke says it’s ok, that Lucas looked freaked out too. Brooke hugs Peyton again and Mouth and Millicent approach looking for Jamie.

-Moira (Karen) is not supposed to be in this episode.

-Lucas has scenes with other characters besides Andy. He has scenes in Tree Hill, not only on Andy's yacht. One is at NH's house.
(credit to AmeliaBeck)

-Michaela was seen on set getting hair and makeup done. The location was a church, and her scenes are taking place in NYC.
(credit to Multiple posters at othforums)

The following (credit to Rebecca:)

-There is a time jump of about one month.

-Peyton changes her mind about selling her car and takes a SALE sign down from the Comet

-Lindsey is back in NY debating about Lucas's book..

-Hilarie filmed a scene walking out of CD Alley, getting into her car and driving away.

-Nathan and Lucas fight Dan basically because they think he kidnapped Jamie. (that was the original spoiler about the kidnapping, if you all remember) It appears that the first scene of 5.13 (this one) picks up exactly where 5.12 left off and then the time jump happens.

Information from Showfax Sides

-Scene 23
Peyton is speaking to Max the record store guy. It sounds like the store is doing poorly, or may have closed. Max asks Peyton how long she has been home. She replies that she has been back for a few months. Max then asks if she has heard any good music lately, and when she answers yes, he notes that she didn't get it at the store. Defensively, Peyton responds, "Oh, so it's my fault." Max then reassures her that it's nobody's fault, he even gets his music online now, too. Peyton then tells him the store was worth more than that. Max hopes so: he'd like to think it had something to do with Peyton's cool new record label. That makes Peyton smile, but the smile soon fades. Perceptively, Max asks Peyton if she thinks about Lucas a lot. She's surprised, but replies, "Every day."

-Scene 25
Start of Act 3. Brooke's House. Brooke paces while Patricia watches. Brooke doesn't understand what Lucas has to do with her wanting to adopt. Patricia intuitively notes that Brooke said her friend, Peyton, is a mess because Lucas almost got married. Lucas had a relationship with someone else, Peyton is now hitting the bars... maybe Brooke is looking for love somewhere else? Brooke is annoyed that Patricia is questioning her reasons for wanting to adopt, and tells her that she's completely wrong. Patricia then asks Brooke if she has ever used drugs. Brooke says she doesn't use drugs, but Patricia brings up Brooke's past lifestyle, the fact that she was arrested for shoplifting, and notes that Brooke recently took a drug addict named Rachel Gatina into her home. Brooke doesn't understand where Patricia heard all of this, until she finally realises that Patricia must have spoken to her mother.

-Scene 26
Andy's Yacht: Andy asks Lucas if he has spoken to Peyton since the wedding. Lucas shakes his head. He says that Jamie went missing, then he had to deal with Dan, and then he left. He never had a chance to speak to Peyton. Andy then asks what Lindsey was talking about on the altar. Lucas' book, a comet... Exasperated, Lucas says it doesn't matter that Peyton's car is a comet. If the guy in Lucas' book had seen a white bronco, everyone would be saying that Lucas loves OJ! Andy then asks what kind of car Lindsey drives, to which Lucas responds, "That's not fair."
513 Sides: Max/Peyton/Brooke/Andy/Lucas