VIKINGS CASTTHE INDEPENDENT FAN GUIDE
Season 5 · Episode 17 · The fan guide

The Most Terrible Thing

Vikings season 5, episode 17, The Most Terrible Thing: Judith tells Alfred that she poisoned Aethelred.

What happens in The Most Terrible Thing?

Spoilers for this episode and earlier events.

Alfred must confront an irreversible action performed in the name of preserving his reign, rather than a conspiracy he can still prevent. Ivar uses a relationship as leverage over Hvitserk, turning diplomacy into another exercise of control within the family. The violence in Iceland destroys Floki’s hope that the settlement can stand apart from revenge.

Season & episode
Season 5, episode 17 of 20
Series order
66 of 89

Story connections: Ivar the Boneless, Hvitserk, Floki and Ubbe.

Identify a face in this episode.

Episode references: HISTORY season guide.

The Most Terrible Thing — Vikings season 5, episode 17
Vikings · S05E17 · The Most Terrible Thing

Key events and consequences

Judith presents Alfred with an irreversible act he did not authorize, limiting what royal forgiveness could accomplish. Ivar makes Hvitserk's personal attachment into political leverage. Kjetill's violence in Iceland then demonstrates how completely the settlement has reproduced the revenge it was supposed to leave behind.

  1. Alfred must confront an irreversible action performed in the name of preserving his reign, rather than a conspiracy he can still prevent.
  2. Ivar uses a relationship as leverage over Hvitserk, turning diplomacy into another exercise of control within the family.
  3. The violence in Iceland destroys Floki’s hope that the settlement can stand apart from revenge.

Key characters

Ivar the Boneless

Ivar uses a relationship as leverage over Hvitserk, turning diplomacy into another exercise of control within the family.

Character story

Hvitserk

Ivar uses a relationship as leverage over Hvitserk, turning diplomacy into another exercise of control within the family.

Character story

Floki

The violence in Iceland destroys Floki’s hope that the settlement can stand apart from revenge.

Character story

Ubbe

Character story

Judith

Character story

Alfred

Alfred must confront an irreversible action performed in the name of preserving his reign, rather than a conspiracy he can still prevent.

Character story

Aethelred

Character story

Aud

Character story

Eyvind

Character story

Thora

Character story

Locations and story geography

Wessex

Alfred must absorb the consequences of a killing committed to secure his reign while preparing for another threat.

Iceland

The killing of Eyvind's family turns a failed reconciliation into the collapse of Floki's communal hope.

Kattegat

Thora's threatened safety gives Ivar control over Hvitserk even when he sends him away.

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

The episode breakdown

The title resists being assigned to only one act. Violence is justified as protection in Wessex, enforced obedience in Kattegat and vengeance in Iceland. Those explanations do not make the resulting losses equivalent, but comparing them exposes the danger of treating a desired future as permission for any means. Floki’s position is especially painful because the community was supposed to escape this pattern. Watch how each storyline separates the person claiming necessity from the people forced to live with its consequences.

Themes to follow

  • Violence justified as necessary protection or vengeance
  • Ideal communities cannot escape responsibility through good intentions

Where the episode leaves us

What can Hvitserk choose while Ivar holds someone he loves at risk?