The Doctor said he hated the architect, but he never told Clara who the architect was. Clara suspects she knows the answer.
Clara knew she should leave. Tampering with the Doctor's past could have huge, perhaps disastrous, consequences, but she couldn't stop herself. Every time she tried, she would look into his old, sad eyes and realize that she could no more leave him than stop breathing.
She didn't know who she was, where she was, or even her own name. All she knew for certain was that she loved the Doctor.
In response to the threat of mass murderer Sirius Black, Harry starts the DA two years early. As a result he and his friends hone their skills, Harry gains a group of loyal friends, and Harry becomes much closer to a certain redhead... H/G RL/NT R/Hr.
One of Rita Skeeter's articles is actually correct, Gasp! This results in Harry's life at the Dursleys to come out in a very public fashion. Harry's freinds wonder how they missed something so big and Ginny goes out for revenge in response.
"He'd adopt every orphan in the world if he could, and the fact that there are so many breaks his heart, because he more than anyone else knows what it's like."
Harry honestly thought that he had put what the Dursleys had done to him behind him, but after an offhanded comment gone wrong, old wounds open up. Lucky his girlfriend is there.
Ginny catches Harry as he walks toward his death in the Deathly Hallows. Do you think she's just going to let him die?