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.

Cast and characters

Regular

Recurring

Special guest star

Episodes

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.