Season seven of The Walking Dead has been defined by one man: Negan. The villainous head basher has gone from bad to worse, torturing the minds of those who remain alive.

Episode four, titled ‘Service’, looks set to continue the morbid trend, once again centring on those who survived Negan’s attack, but this time over an extended period as the episode will last 90 minutes instead of 60.

Following the third episode’s conclusion, the trailer has been released showcasing Rick once again struggling with authority.

The synopses for the episode reads: “The remaining members of the group try to keep it together in Alexandria; they receive a sobering visit.”

The Walking Dead season 7 trailer: Frame-by-frame dissection Show all 17 1 /17 The Walking Dead season 7 trailer: Frame-by-frame dissection The Walking Dead season 7 trailer: Frame-by-frame dissection Negan with his baseball bat slung across his shoulder. The Walking Dead season 7 trailer: Frame-by-frame dissection This shows The Saviours bowing down to their leader. The Walking Dead season 7 trailer: Frame-by-frame dissection An ominous shot of Negan (Jeffrey Dean Morgan) repeatedly slamming Lucille against a gate. The Walking Dead season 7 trailer: Frame-by-frame dissection "There are rules. You earn what you take," Negan snarls. "You should know this is the only way." Could that be Daryl (Norman Reedus) in the background? The Walking Dead season 7 trailer: Frame-by-frame dissection We're going to assume this is a member of the Saviours killing a chained up walker. Why there's a letter "F" emblazoned on his clothes, we don't know. The Walking Dead season 7 trailer: Frame-by-frame dissection A member of the Kingdom first seen encountering Morgan (Lennie James) and Carol (Melissa McBride) in the season 6 finale The Walking Dead season 7 trailer: Frame-by-frame dissection The Saviours The Walking Dead season 7 trailer: Frame-by-frame dissection Season 7 will have a car chase; this shot shows an unknown driver seeming to face off against a truck tucked between two motorcyclists. The Walking Dead season 7 trailer: Frame-by-frame dissection This will either be the compound of either The Saviours or The Kingdom. Whichever it is, going by the shot (someone sneaking around behind cover), they've been infiltrated. The Walking Dead season 7 trailer: Frame-by-frame dissection Savour Dwight (Austin Amelio - now a main cast member) and an unknown female, most probably the two motorcyclists form the previous shot. The Walking Dead season 7 trailer: Frame-by-frame dissection Dwight and his leader, Negan. The Walking Dead season 7 trailer: Frame-by-frame dissection Morgan firing a gun alongside a member of The Kingdom, The Walking Dead season 7 trailer: Frame-by-frame dissection Somebody here is trying to fend off a gruesome-looking Walker - could it be Abraham (Michael Cudlitz)? If so, this would eliminate him from being Negan's victim. The Walking Dead season 7 trailer: Frame-by-frame dissection A perplexed-looking Carol who was suffering a gunshot wound last time we saw her. The Walking Dead season 7 trailer: Frame-by-frame dissection Somebody coming off a motorcycle. The Walking Dead season 7 trailer: Frame-by-frame dissection Tara (Alanna Masterson) alone in the woods, clutching a knife as she spies an enemy in the distance. The Walking Dead season 7 trailer: Frame-by-frame dissection A POV shot of an unknown character getting knocked out by a rifle Tara has somehow acquired.

However, it is perhaps episode five’s synopses that reveals more about ‘Service’. It reads: 'Saddled with grief and surrounded by enemies, members of the group try to find safety at the Hilltop before it's too late.’

Saddled with grief? Could another member of Rick’s gang be about to die? In the meantime, you can read about the five major talking points from episode three here.