last episode-
Brooke can't be pregnant , but she and Julian will try everything.
Clay and Quinn are a couple now and Naley don't like it ...
Uhmmm ... Nathan don't play in NBA .. I think :D (because of Clay)
Milli had a fight with Brooke

I don't remember more .. sorry (:

great thank you for that Jessica , isn't quinn haley's sister and who is clay?

oh no he loves his basketball thats not good if he cant play huh thanks again!

Clay is Nathan's agent! And yes, Quinn is Haley's sister!

I don't have time, sorry.

I can get you an update on the last episodes : (from episode 13-18) Haley has her summer tour presenting on the show a few songs , Quinn is divorced officially from her ex-husband David (she is a couple with Clay , and btw Clay in the end became Nathan's agent getting him a spot on the NBA)Taylor comes back (if you remeber he bigger sister who was a 'bitch' , she appeared in s2 aswell ) and suprise is that she hooked up with David and became an item , Quinn shows her she doesn't care while Haley is getting out of her mind , they have a dinner , Quinn comes with Clay and in the end it turns up in a mess.In episode 15 they have at school a 80's night , at Tree Hill high school .Meanwhile Julian gets the financial to make his movie with Alex and Alex's script.Haley's,Taylor's,Quinn's mom comes to tree hill (their father died ) and she tells her that she has pancreatic cancer and that she is going to die , and wants to spend her time left with them , cause there is no succesfull treatment.Taylor gets mad and run away.In the end , Lidia (their mom ) gets in to hospital where Quinn gets Taylor to come and Quinn and Haley make 'peace' with Taylor.Brooke and Julian get back togheter and Lidia dies.Hoped it helped cause i see for 3 months nobody posted .

By the way Quinn and David break up in episode 16 , actually David dumped her :P

And i will give you a site :link , there it says all the songs in one tree hill and there is a 'Music by episode ' section and it says and a descreption of the certain episode :P