Bjorn will face an existential threat in Season 4 episode 9.Facebook/Vikings

Fans of "Vikings" are perhaps in for a shock. The latest installment of the historical drama has in store several plot twists, death and a thirst for vengeance. In Season 4, the episode 9 titled "Death All 'Round" includes one horrific moment involving Bjorn Ironside (Alexander Ludwig).

Ragnar's son Bjorn may very well meet his end in episode 9. The eldest son of the King of Kattegat stands fearless when Torvi (Georgia Hirst) says that she is sent to kill him. He asks her to go ahead and finish the deed. However, his fate is still unknown. In a dramatic twist, the creators may well make him survive and depict Torvi's end.

The Norsemen's camp in Frankia will face more problems in the upcoming episode. Ragnar (Travis Fimmel) tells his men that he doesn't want to raid Paris. Instead, he wants to fight his brother Rollo (Clive Standen).

Earlier, the Viking warrior made his men transport their ships to Paris. He reminded them that he hasn't forgotten the raid, but it becomes clear that a victory for him lies in defeating Rollo. If the title of the episode is an indication of what's to come, then fans can expect a blood bath between the brothers.

Season 4 episode 9's synopsis (via TV Guide) reads:

As they near Paris, the Vikings relaunch their boats, but this time they bear interesting structures made by Floki; Aethelwulf and Alfred arrive in Rome, where honours are bestowed by Pope Leo, but in Wessex, relations are less than cordial between King Ecbert and a disgruntled King Aelle.

"Vikings" Season 4 episode 9 airs 10 p.m. EST on Thursday, April 14 on History. You can live-stream the episode via History Channel's website.