Mitch Ryan

Nathan tries to help Haley and Jamie confront Lydia's (recurring guest star BESS ARMSTRONG - My So-Called Life, Boston Legal) seemingly hopeless situation, while Brooke and Julian navigate their volatile relationship in the midst of a hectic movie shoot. Meanwhile, Clay and Quinn spend some time apart, and Miranda (recurring guest star INDIA DE BEAUFORT) tries to prove to Grubbs (recurring guest star MICHAEL GRUBBS - of the band Wakey!Wakey!) that she's the right person to produce his album. The episode was directed by series star Bethany Joy Galeotti.

Nathan struggles to reach an increasingly despondent Haley, while Quinn leads Jamie on a Tree Hill treasure hunt. Julian shows his finished film to Brooke, and Clay is forced to deal with a deranged Katie (recurring guest star AMANDA SCHULL).

On the eve of Quinn's big gallery opening, an uninvited guest ambushes Clay. Nathan spends the day with Jamie, while Haley struggles with life after her mother's passing. Brooke and Julian each receive a shocking surprise. Meanwhile, Skills learns the truth about Lauren (recurring guest star ALLISON MUNN - That '70s Show, What I Like About You) and Mouth.

The Scott family joins Haley on the last leg of her tour, while Brooke and Julian reconnect after their six-week break. Clay and Quinn try to figure out how to move forward after his public declaration of love, and a post-rehab Alex (recurring guest star Jana Kramer) tries to make amends with herself and the people she's let down.

As Brooke angrily deals with Alex's (recurring guest star JANA KRAMER) tryst with Julian, Lydia's (recurring guest star BESS ARMSTRONG) condition worsens, prompting Quinn and Haley to try to reconnect with Taylor (recurring guest star LINDSEY McKEON). Clay is forced to deal with Katie's (recurring guest star AMANDA SCHULL) unsettling advances, and Nathan helps Jamie come to terms with Lydia's impending death.