It won't be long before the second half of "Vikings" season 4 starts to air, and the biggest question that fans have so far is who is going to get killed next.

As the historical series returns for its second half, fans cannot help but think that Ragnar Lothbrok is the next on the death list. It can be recalled that in the first half of the season, a lot of characters were killed off. These include Amy Bailey's Queen Kwenthrith of Mercia, Ben Robson's Earl Kalf, Edvin Endre's Erlendur, son of King Horik, Dianne Doan's Yidu, Queen Aslaug's new slave, Rosalie Connerty's Angrboda, Floki and Helga's daughter, and Jessalyn Gilsig's Siggy.

According to reports, the second half of season 4 will see the death of Ragnar the King as he gets killed off by one of his allies. While there are still no confirmed reports as to who will kill him, fans have a good number of suspects. Ragnar left Kattegat and was gone for too long that even his sons abhorred him and desired to kill him. This is because if he gets killed, one of them will automatically be the king.

There are rumors that before his rumored death, the episodes will try to explain why Ragnar returned and will not focus much on what he did while he was away.

Meanwhile, a new female character named Astrid will join the cast of season 4B as the lover of Lagertha. Bjorn will also travel to the Mediterranean with Floki. According to reports, the upcoming series will see Bjorn's relationship flourish.