The Walking Dead season 4 finale aired this Sunday with a massive 15.7 million viewers to AMC.

The finale episode saw survivors Rick Grimes, Carl, Michonne and Daryl arriving safely at Terminus. Rick's group was reunited with Glenn, Maggie, Sasha and Bob but fans don't know what happened to Beth, Carol and Tyreese were not

Show creator Robert Kirkman recently hinted at what is to come in Walking Dead season 5. "Who the people of Terminus are and what their deal is will be dealt with fairly quickly when we come back for season five," Kirkman told TVLine.

Regarding what happened to Beth, Carol and Tyreese, he said: "We'll deal with [their whereabouts] fairly quickly [in the next series].. We kind of felt like we needed more unknowns to keep people guessing. Leaving the fate of Beth and Carol and Tyreese and Judith completely ambiguous... gives us that."

The next season is expected to be different from the past four seasons of the show.

Showrunner Scott Gimple told Talking Dead that the writers are currently working very hard on the new season. "We're looking at all the new places we're going. It's going to be an incredible season," he said.

The Hollywood Reporter states that Alanna Masterson (Tara), Christian Serratos (Rosita) and Andrew J. West (Gareth), have been promoted as cast regulars for the fifth season of the show.

Kirman told THR: "Seeing Gareth and Rick and the people of Terminus and our survivors go head-to-head is going to be interesting. There is a very deep, dark and storied history to Terminus and how these people came to be that will be revealed in season five."

The first half of Walking Dead season 5 will be returning to the small screen in October this year.