what did he say to rick?is that why rick has gon' bonkers?
The actor who plays Rick acknowledged that something was said, but they have yet to reveal it on the show. And according to several spoiler sites it is that everyone is already infected, hence the name "walking dead" And they kind of hint at it when Rick stands over the fat bandit in the last episode, pauses, then shoots him one last time in the head for good measure.
Also heard another rumor that Rick stabs Shane and k!lls him, only for Shane to be reanimated and having Carl k!ll his zombie version. And that is how the fans and other people on the show discover what Rick knew all along
. But these could all be false, so take it with a grain of salt.