A Rush of Blood to the Head

S9, E8: Haley receives news of a possible tragedy. Dan's search for Nathan leads him back to his dark past. Clay has a breakthrough in his treatment. Brooke and Julian deal with Xavier (recurring guest star DEVIN McGEE). Chase's concern for Chuck (recurring guest star MICHAEL MAY) pushes him to his limits. Former series stars BARBARA ALYN WOODS and ANTWON TANNER guest star. Haley receives news of a possible tragedy. Dan's search for Nathan leads him back to his dark past. Clay has a breakthrough in his treatment. Brooke and Julian deal with Xavier (recurring guest star DEVIN McGEE). Chase's concern for Chuck (recurring guest star MICHAEL MAY) pushes him to his limits. Former series stars BARBARA ALYN WOODS and ANTWON TANNER guest star.