Vikings

A Good Treason (Season 4, Episode 1)

TV-14

TV Episode | 44 min | Action, Adventure, Drama

As Ragnar lies in his sick bed in Kattegat, events unfold beyond his control.

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Cast	+ Add Cast
33 cast members

Name	Known for
Travis Fimmel Ragnar Lothbrok Ragnar Lothbrok See fewer	Warcraft (2016)
Katheryn Winnick Lagertha Lagertha See fewer	Vikings (2013)
Clive Standen Rollo Rollo See fewer	Vikings (2013)
Gustaf Skarsgård Floki Floki See fewer	Oppenheimer (I) (2023)
Alexander Ludwig Bjorn Lothbrok Bjorn Lothbrok See fewer	Vikings (2013)
Alyssa Sutherland Queen Aslaug Queen Aslaug See fewer	Evil Dead Rise (2023)
Ben Robson Kalf Kalf See fewer	The Boy (2016)
Lothaire Bluteau Emperor Charles Emperor Charles See fewer	Vikings (2013)
John Kavanagh The Seer The Seer See fewer	Alexander (2004)
George Blagden Athelstan (credit only) Athelstan (credit only) See fewer	Rubikon (2022)
Dianne Doan Yidu Yidu See fewer	Warrior (2019)
Maude Hirst Helga Helga See fewer	Vikings (2013)
Owen Roe Count Odo Count Odo See fewer	Michael Collins (1996)
Edvin Endre Erlendur Erlendur See fewer	Eddie the Eagle (2015)
Georgia Hirst Torvi Torvi See fewer	Vikings (2013)
Søren Pilmark Stender (credit only) Stender (credit only) See fewer	Flickering Lights (2000)
Morgane Polanski Princess Gisla Princess Gisla See fewer	The Ghost Writer (2010)
Stephen Rockett Hvitserk Hvitserk See fewer	Vikings (2013)
Luke Shanahan Ubbe Ubbe See fewer	Vikings (2013)
Elijah O'Sullivan Sigurd Sigurd See fewer	Vikings (2013)
James Quinn Markey Ivar Ivar See fewer	The Hole in the Ground (2019)
Steve Wall Einar Einar See fewer	Dune: Part Two (2024)
Shashi Rami Slave Trader Slave Trader See fewer	Harry Potter and the Goblet of Fire (2005)
Rosalie Connerty Angrboda Angrboda See fewer	Vikings (2013)
Barry McGovern French Archbishop French Archbishop See fewer	Braveheart (1995)
Frankie McCafferty Sinric Sinric See fewer	Philomena (2013)
Huw Parmenter Roland Roland See fewer	Close (I) (2019)
Karen Hassan Therese Therese See fewer	Wait for Me (2023)
Simon Jewell Frankish Officer Frankish Officer See fewer	Vikings (2013)
Cillian O'Sullivan Eirik Eirik See fewer	Star Trek: Strange New Worlds (2022)
Jordan Coombes Viking Settler (uncredited) Viking Settler (uncredited) See fewer	Vikings (2013)
Kristine Kenina Shield Maiden (uncredited) Shield Maiden (uncredited) See fewer	Picture of You (2020)
Ross Magee Boat Captain (uncredited) Boat Captain (uncredited) See fewer	Robot Overlords (2014)