VIKINGS CASTTHE INDEPENDENT FAN GUIDE
Season 4 · Episode 18 · The fan guide

Revenge

Vikings season 4, episode 18, Revenge: The Great Army crosses to Northumbria and overwhelms Ælle’s defense.

What happens in Revenge?

Spoilers for this episode and earlier events.

Bjorn and Ivar disagree over command. Ubbe marries Margrethe, while Harald encounters Ellisif and learns she has married another man. Harald and Halfdan arrange for Egil to infiltrate Kattegat. Æthelwulf confronts Ecbert over his treatment of him before accepting responsibility for defense. In Northumbria, Ælle’s force is defeated, and Ragnar’s sons execute the captured king by blood eagle.

Season & episode
Season 4, episode 18 of 20
Series order
47 of 89

Story connections: Bjorn Ironside, Ivar the Boneless, Ubbe and Hvitserk.

Identify a face in this episode.

Episode references: HISTORY season guide · Community episode record.

Revenge — Vikings season 4, episode 18
Vikings · S04E18 · Revenge

Key events and consequences

Defeating Ælle fulfills a named act of vengeance but does not supply the coalition with a common plan afterward. The disagreement over command exists before that victory. Harald's hidden move toward Kattegat shows that participation in the same army can coexist with preparing to seize an ally's home.

  1. Bjorn and Ivar disagree over command. Ubbe marries Margrethe, while Harald encounters Ellisif and learns she has married another man. Harald and Halfdan arrange for Egil to infiltrate Kattegat.
  2. Æthelwulf confronts Ecbert over his treatment of him before accepting responsibility for defense. In Northumbria, Ælle’s force is defeated, and Ragnar’s sons execute the captured king by blood eagle.

Key characters

Bjorn Ironside

Bjorn and Ivar disagree over command. Ubbe marries Margrethe, while Harald encounters Ellisif and learns she has married another man. Harald and Halfdan arrange for Egil to infiltrate Kattegat.

Character story

Ivar the Boneless

Bjorn and Ivar disagree over command. Ubbe marries Margrethe, while Harald encounters Ellisif and learns she has married another man. Harald and Halfdan arrange for Egil to infiltrate Kattegat.

Character story

Ubbe

Bjorn and Ivar disagree over command. Ubbe marries Margrethe, while Harald encounters Ellisif and learns she has married another man. Harald and Halfdan arrange for Egil to infiltrate Kattegat.

Character story

Hvitserk

Character story

King Harald Finehair

Æthelwulf confronts Ecbert over his treatment of him before accepting responsibility for defense. In Northumbria, Ælle’s force is defeated, and Ragnar’s sons execute the captured king by blood eagle.

Character story

Floki

Character story

King Ecbert

Æthelwulf confronts Ecbert over his treatment of him before accepting responsibility for defense. In Northumbria, Ælle’s force is defeated, and Ragnar’s sons execute the captured king by blood eagle.

Character story

Margrethe

Bjorn and Ivar disagree over command. Ubbe marries Margrethe, while Harald encounters Ellisif and learns she has married another man. Harald and Halfdan arrange for Egil to infiltrate Kattegat.

Character story

Egil

Bjorn and Ivar disagree over command. Ubbe marries Margrethe, while Harald encounters Ellisif and learns she has married another man. Harald and Halfdan arrange for Egil to infiltrate Kattegat.

Character story

Locations and story geography

Northumbria

Ælle's defeat and execution turn the brothers' promise of vengeance into a completed act.

Kattegat

Egil's infiltration prepares a separate struggle for power behind the campaigning army.

These are places in the story. For the real landscapes used on screen, explore the filming-location guide.

The episode breakdown

What changes in this episode

Bjorn and Ivar disagree over command. Ubbe marries Margrethe, while Harald encounters Ellisif and learns she has married another man. Harald and Halfdan arrange for Egil to infiltrate Kattegat. Æthelwulf confronts Ecbert over his treatment of him before accepting responsibility for defense. In Northumbria, Ælle’s force is defeated, and Ragnar’s sons execute the captured king by blood eagle.

Why it matters — original analysis

The title names an objective that appears capable of ending a story, but the episode surrounds its fulfillment with ambitions it cannot satisfy. Harald’s pursuit of status meets a refusal that conquest has not prevented. The brothers’ shared target does not settle who should lead them. Æthelwulf also faces the problem of being needed by someone whose love and respect he questions. Across these strands, recognition is demanded through service and violence, yet neither provides a reliable guarantee of receiving it.

Rewatch focus — original analysis

The blood eagle is a screen event within this drama; the guide does not present it as proof of how the historical Ælle died. Keep the landing, the battle and the execution distinct. Their different scales show how a public campaign is brought to bear on an intimate account of a father’s death.

Themes to follow

  • vengeance fulfilled
  • status and humiliation
  • violence as obligation

Where the episode leaves us

What will hold the army together after its first target is dead?

The history behind the drama

The history behind this episode.

Was Ragnar Lothbrok a real person?

The familiar Ragnar gathers several kinds of material into one life. Later legends and the historical campaigns associated with men claimed as his sons do not establish the television biography.

Keep the distinctionRead the family on screen as drama; investigate a named person, campaign or source separately.

Ragnar: history and later legendWho counted as a Viking?

Browse more questions from the series