The titles and descriptions are now available for episodes 1 to 8 of season 4. Check them out below. I’m going to make a few guesses down below on what happens from the descriptions.

The Walking Dead season 4 episodes 1-8 titles and descriptions

Episode 4.01: “30 Days Without an Accident” – The group lives an ideal life at the prison, and strives to hold onto humanity.

Episode 4.02: “Infected” – The group faces a new enemy; Rick and the others fight to protect their hard-won livelihood.

Episode 4.03: “Isolation” – A group leaves the prison to search for supplies; the remaining members of the group deal with recent losses.

Episode 4.04: “Indifference” – The supply mission faces hurdles; the situation at the prison worsens.

Episode 4.05: “Internment” – Assorted enemies pressure Rick and the group; the survivors and the prison may reach a breaking point.

Episode 4.06 – “Live Bait” – Group members struggle to find their humanity while being constantly threatened.

Episode 4.07 – “Dead Weight” – Something new unfolds at a camp outside the prison; the addition of new members may threaten peace.

Episode 4.08 – “Too Far Gone” – After things begin to calm at the prison, Rick and the group face imminent danger.
Source: dailydead.com

My guesses
Episode 5 sounds like there’s going to be more than one kind of enemy for Rick’s group. Maybe the hunters show up? If you read the comic book then you know about them. Episode 6 is titled “Live Bait” and that definitely sounds like the hunters there.

Episode 7 sounds like another group or someone is nearby the prison. Could it be the Governor? New additions to the prison? Could we see Abraham, Rosita and Eugene in this episode?

Episode 8 makes me think that this episode is when the Governor will attack the prison.