"Mercy" is the third episode of the fourth season of Vikings. It is the thirty-second episode of the series overall. It first aired on March 3, 2016. It was written by creator Michael Hirst and directed by Ciarán Donnelly.


Ragnar informs Floki of a heavy price he has paid for his actions; Rollo finds an unlikely ally in Count Odo; Bjorn has to fight a fierce opponent in the wilderness.


Ragnar and King Ecbert both experience separate visions of Athelstan, who relays the words "Mercy". Rollo attempts to learn the language of his new home, while enduring more of Gisla's mistreatment. Kalf hires a Berserker to assassinate Bjorn on King Horik's son's behalf. Erlendur gives the assasin a signet ring, which would allow the man passage for any who would stop him. Bjorn obsesses over killing a bear that has managed to escape his traps. Floki and Helga struggle to cope with the death of their daughter. Ragnar approaches the cave with an axe, tells Helga that she has suffered enough and frees Floki. Lagertha sleeps with Kalf and he tells her he loves her – however she fails to reciprocate. Aethelwulf has returned with the rescued Queen Kwenthrith and her son Magnus. Judith's obsession with Athelstan continues. Wessex continues preparing its soldiers, Count Odo readies a defense of Paris, and Ragnar cleans fish giving the impression that he is not ready to resume exploring distant lands.

Recap Video

Vikings Recap Mercy (S4, E3) History

Vikings Recap Mercy (S4, E3) History



Guest Starring

Additional Cast (in order of appearance)


  • Finn and Luca Ryan as Magnus

Episode Deaths

  • NA


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