One Tree Hill

The voiceover at the end of the episode was previously used at the end of season 5 episode 13, "Echoes, Silence, Patience and Grace".

Goof: When Haley offers to let Dan hold Lydia and picks her up from the stroller, Lydia is wearing one shoe that falls off. Later in the scene when Lydia is sitting on Dan's lap, she has pink tennis shoes on both feet.

Chris: (after a bigger guard comes out) What happened to the little Marty The Midget-size guy?

Marty the Midget, played by Danny Woodburn, was the guy who Nathan and Chris played poker with in season 3 episode 9, "How a Resurrection Really Feels."

Goof: When Quinn is holding her phone next to Clay's to install the tracking app, she turns around to talk to Clay with her hand up by her shoulder. When the camera angle changes, her hand is by her side.

Nathan's voiceover at the beginning and end of the episode is taken from Shakespeare's play "The Tempest".

Madison replaces the red heart shoelace from Jamie with a black shoelace after he ignores her to be with the boys. This is similar to Lucas painting the red door in his bedroom black after Brooke sleeps with Chris Keller in season 3.

The opposing players at Jamie's baseball game have the words "Davola's Pizza and Pasta" printed on the back of their jerseys. This is a possible reference to Joe Davola, an executive producer for the series.

Goof: When Alex and Chase say 'cheers' after her performance at Tric, Chase is holding and the glass with his right hand. When the camera angle shifts to behind Chase, the glass is in his left hand.

Goof: When Sylvia is showing Brooke and Haley pictures on her phone at the fire station, she is holding her phone vertically. When the camera angle changes to a close-up of the picture, her phone has suddenly turned sideways. Later in the scene, Sylvia is holding the phone vertically again.

Goof: Haley rubs the phone number on Brooke's leg with her thumb, but she licks her index finger to determine that the number is written in chocolate.

Goof: Early in the episode, Brooke is wearing boots when she's in the bathroom, but when she runs into the living room in the next scene she is barefoot.

Goof: When Nathan looks behind the couch at the dog on the skateboard, he's smiling, but when the camera changes angles his face immediately changes to a serious expression.

This episode's plot is very similar to the 2009 movie The Hangover, in which the characters try to piece together the previous night's events after partying.

Nathan saying "promise me you'll stay away from anyone with Keller in their name" is not only referring to his current professor but also to Chris Keller who almost broke up his marriage with Haley in season 2.

This episode we find out how many characters got their nicknames. Mouth always commentated on the River Court games and one day Nathan came by, punched him in the face and told him he had a big mouth, and the name stuck. Skills is "good at a lot of things." Fergie's name is Ferguson. Junk's parents own a Junkyard.

Number: 23.

The number 23 is the last act of the night, and it's Laura Izibor performing Can't Be Love. This number consistently throughout the series, most frequently as Nathan's jersey number. Haley also has 23 tattooed on her lower back.

Alex tells Chase that she's never been in love, but in Season 7 she texts Julian that she loves him.

Patrick Stump from Fall Out Boy put his spin on Gavin DeGraw's "I Don't Want To Be" during the opening credits.

Goof: When Julian, Nathan, Chase, Clay, and Jamie are having a snowball fight, Jamie throws himself into the snow and Chase jumps beside him, on Jamie's right side. When the camera changes angles, Chase is on the other side of Jamie.

Haley reveals that she's pregnant again.