One Tree Hill season 4

The fourth season of One Tree Hill began airing on September 27, 2006. The season concluded on June 13, 2007, after 21 episodes. This is the first season to air on the newly formed The CW television network.

Season four rose in ratings, becoming #133 in the Nielsen ratings system with 1.3 rating and averaging 2.99 million viewers. Episode #10 "Songs To Love and Die By" was the highest rated episode of the season by having 4.24 million viewers tuning in and the most viewed among the entire series after season 2 along with the previous one, "Some You Give Away", which had 4.21 million viewers tuning in.

The season had a brief hiatus for three months from February 2007 to May 2007, to make their timeslot available for the short-lived series Pussycat Dolls Present: The Search for the Next Doll. The show returned May 2, 2007 to air the last 6 episodes of the season. This marked the first and last season of the show to air into June.

In this season, most episodes were named after rock albums rather than after songs.

Regular

 * Chad Michael Murray as Lucas Scott
 * James Lafferty as Nathan Scott
 * Hilarie Burton as Peyton Sawyer
 * Bethany Joy Galeotti as Haley James Scott
 * Paul Johansson as Dan Scott
 * Sophia Bush as Brooke Davis
 * Barbara Alyn Woods as Deb Scott
 * Lee Norris as Mouth McFadden
 * Antwon Tanner as Skills Taylor
 * Danneel Harris as Rachel Gatina
 * Barry Corbin as Whitey Durham
 * Moira Kelly as Karen Roe

Recurring

 * Bevin Prince as Bevin Mirskey
 * Shawn Shepard as Principal Turner
 * Stephen Colletti as Chase Adams
 * Kelsey Chow as Gigi Silveri
 * Matt Barr as Ian Banks
 * Vaughn Wilson as Fergie Thompson
 * Cullen Moss as Junk Moretti
 * Elisabeth Harnois as Shelley Simon
 * Ernest Waddell as Derek Sommers
 * Rick Fox as Daunte Jones
 * Amber Wallace as Glenda Farrell
 * Allison Scagliotti as Abby Brown
 * Michael Trucco as Cooper Lee
 * Tyler Hilton as Chris Keller
 * Mary Kate Englehardt as Lily Roe Scott

Special guest star

 * Craig Sheffer as Keith Scott

Reception
The season premiere was seen by 3.64 million U.S. viewers and achieved a 1.7 Adults 18-49 rating, up 19% in viewers and 55% in demo from the season 3 finale. Episode 2 hit a season high in the Adults 18-34 demo with a 2.0 rating, while episode 9 and 10 hit season highs in viewers with 4.21 and 4.24 million respectively, the highest results since season 2. The season finale was seen by 2.5 million viewers.

DVD release
The DVD release of season four was released after the season has completed broadcast on television. It has been released in Region 1. As well as every episode from the season, the DVD release features bonus material such as, audio commentaries on some episodes from the creator and cast, deleted scenes, gag reels and behind-the-scenes featurettes.