The Walking Dead, Season 2

Rick Grimes':
[to Lori] I killed him. I killed Shane. He came at me. He killed Randall to get me in the woods. He planned it. I had - I had no choice. I gave him every chance... and he kept leading me further out. He pushed me, and I let him. After awhile, I knew - I knew what he was doing, what he was up to. And I kept going. I didn't stop. I could have, but... I just wanted it over. Dogging me every step of the way. Acting like I stole you and Carl, like... like I was in the way. I just wanted it over. I wanted him dead. I killed him. He turned. That's how I knew Jenner was right. Carl put him down.