Fox will air the zombie drama only five days after it screens in the US on AMC.
Season three left the show on a cliffhanger finale as the Governor (David Morrissey) escaped.
Andrew Lincoln, who plays Rick Grimes on the show, has promised a "deeper, darker season".
Co-star Lauren Cohan, who plays Maggie Greene, added: "There's this wonderful slow burn to this season that really, really catches you off guard when something happens, because what we get this season that I don't think we've had as much of is very specific deep character development.
"Where we go off on these little loops into these characters' lives and then you're just caught from the side with the horror."
Watch a season four preview: