• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alyssa Sutherland (Aslaug), Donal Logue (King Horik)
• Guest Starring: Thorbjørn Harr (Jarl Borg), Nathan O'Toole (Bjorn Lothbrok)
• Additional Cast in Order of Appearance: Tadhg Murphy (Arne), Jefferson Hall (Torstein), Alvaro Lucchesi (Pagan Priest), Maude Hirst (Helga), Morgan C. Jones (Law Giver), Pagan McGrath (Woman), Carrie Crowley (Elisef)
• Written By: Michael Hirst
• Directed By: Ciarán Donnelly

• Starring: Travis Fimmel (Ragnar), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alyssa Sutherland (Aslaug), Donal Logue (King Horik), Linus Roache (King Ecbert)
• Guest Starring: Thorbjørn Harr (Jarl Borg), John Kavanagh (The Seer)
• Additional Cast in Order of Appearance: Anna Aström (Hild), Cormac Melia (Ubbe), Maude Hirst (Helga), Jefferson Hall (Torstein), Cathál Ó'Hallin (Hvitserk), Jay Duffy (Ari), Edvin Endre (Erlendur), Robert Fawsitt (Saxon #1), Conor Marren (Saxon #2), James Browne (Messenger)
• Written By: Michael Hirst
• Directed By: Ciarán Donnelly

• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alexander Ludwig (Bjorn), Alyssa Sutherland (Aslaug), Donal Logue (King Horik), Linus Roache (King Ecbert)
• Guest Starring: Thorbjørn Harr (Jarl Borg), Morten Sasse Suurballe (Sigvard)
• Additional Cast in Order of Appearance: Jefferson Hall (Torstein), Edvin Endre (Erlendur), Moe Dunford (Aethelwulf), Duncan Lacroix (Ealdorman Werferth), Alan Devine (Ealdorman Eadric), Philip O'Sullivan (Bishop Edmund), Fionn Foley (Bell Monk), Chris Gallagher (Monk), Edmund Kente (Bishop Swithern), Georgia Hirst (Torvi), Cormac Melia (Ubbe), Cathál Ó'Hallin (Hvitserk), Mark Lewis (Old Warrior)
• Written By: Michael Hirst
• Directed By: Ken Girotti

• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alexander Ludwig (Bjorn), Alyssa Sutherland (Aslaug), Donal Logue (King Horik), Linus Roache (King Ecbert)
• Guest Starring: Thorbjørn Harr (Jarl Borg), John Kavanagh (The Seer), Morten Sasse Suurballe (Sigvard)
• Additional Cast in Order of Appearance: Morgan C. Jones (Law Giver), Philip O'Sullivan (Bishop Edmund), Edvin Endre (Erlendur), Moe Dunford (Aethelwulf), Duncan Lacroix (Ealdorman Werferth), Jefferson Hall (Torstein), Richard Ashton (Thorvard), Maude Hirst (Helga), Georgia Hirst (Torvi), Cormac Melia (Ubbe), Cathál Ó'Hallin (Hvitserk)
• Written By: Michael Hirst
• Directed By: Ken Girotti

• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alexander Ludwig (Bjorn), Alyssa Sutherland (Aslaug), Donal Logue (King Horik), Linus Roache (King Ecbert)
• Guest Starring: Thorbjørn Harr (Jarl Borg), John Kavanagh (The Seer)
• Additional Cast in Order of Appearance: Maude Hirst (Helga), Jefferson Hall (Torstein), Cormac Melia (Ubbe), Cathál Ó'Hallin (Hvitserk), Rachel-Mae Brady (Young Woman), Jens Christian Bushov Lund (Olrik), Georgia Hirst (Torvi), Morgan C. Jones (Law Giver), Carrie Crowley (Elisef), Moe Dunford (Aethelwulf), Philip O'Sullivan (Bishop Edmund), Richard Ashton (Thorvard)
• Written By: Michael Hirst
• Directed By: Jeff Woolnough

• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alexander Ludwig (Bjorn), Alyssa Sutherland (Aslaug), Donal Logue (King Horik), Linus Roache (King Ecbert)
• Guest Starring: Thorbjørn Harr (Jarl Borg), John Kavanagh (The Seer), Morten Sasse Suurballe (Sigvard), Gaia Weiss (Porunn)
• Additional Cast in Order of Appearance: Edvin Endre (Erlendur), Maude Hirst (Helga), Jefferson Hall (Torstein), Cathál Ó'Hallin (Hvitserk), Georgia Hirst (Torvi), Derry Power (Older Man), Moe Dunford (Aethelwulf), Cormac Melia (Ubbe), Steve Wall (Uncle Einar), Rick Burn (Warrior)
• Written By: Michael Hirst
• Directed By: Jeff Woolnough

• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alexander Ludwig (Bjorn), Alyssa Sutherland (Aslaug), Donal Logue (King Horik), Linus Roache (King Ecbert)
• Guest Starring: Thorbjørn Harr (Jarl Borg), John Kavanagh (The Seer), Ivan Kaye (King Aelle), Gaia Weiss (Porunn)
• Additional Cast in Order of Appearance: Edvin Endre (Erlendur), Jefferson Hall (Torstein), Sarah Greene (Judith), Cathy White (Elsewith), Moe Dunford (Aethelwulf), Philip O'Sullivan (Bishop Edmund), Maude Hirst (Helga), Georgia Hirst (Torvi), Barbara Griffin (Sorceress), Noni Stapleton (Priestess), Mark McAuley (Envoy)
• Written By: Michael Hirst
• Directed By: Kari Skogland

• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alexander Ludwig (Bjorn), Alyssa Sutherland (Aslaug), Donal Logue (King Horik), Linus Roache (King Ecbert)
• Guest Starring: Amy Bailey (Princess Kwenthrith), Gaia Weiss (Porunn)
• Additional Cast in Order of Appearance: Barbara Griffin (Sorceress), Edvin Endre (Erlendur), Moe Dunford (Aethelwulf), Sarah Greene (Judith), Philip O'Sullivan (Bishop Edmund), Cathál Ó'Hallin (Hvitserk), Cormac Melia (Ubbe), Steve Wall (Uncle Einar), Maude Hirst (Helga), Jefferson Hall (Torstein)
• Written By: Michael Hirst
• Directed By: Kari Skogland

• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alexander Ludwig (Bjorn), Alyssa Sutherland (Aslaug), Donal Logue (King Horik), Linus Roache (King Ecbert)
• Guest Starring: Amy Bailey (Princess Kwenthrith), Ivan Kaye (King Aelle), Gaia Weiss (Porunn)
• Additional Cast in Order of Appearance: Jefferson Hall (Torstein), Edvin Endre (Erlendur), Moe Dunford (Aethelwulf), Philip O'Sullivan (Bishop Edmund), Sarah Greene (Judith), Cathál Ó'Hallin (Hvitserk), Cormac Melia (Ubbe), Carrie Crowley (Elisef)
• Written By: Michael Hirst
• Directed By: Ken Girotti

• Starring: Travis Fimmel (Ragnar), Katheryn Winnick (Lagertha), Clive Standen (Rollo), Jessalyn Gilsig (Siggy), Gustaf Skarsgård (Floki), George Blagden (Athelstan), Alexander Ludwig (Bjorn), Alyssa Sutherland (Aslaug), Donal Logue (King Horik)
• Guest Starring: John Kavanagh (The Seer), Gaia Weiss (Porunn)
• Additional Cast in Order of Appearance: Maude Hirst (Helga), Elizabeth Moynihan (Gunnhild), Edvin Endre (Erlendur), Jefferson Hall (Torstein), Cathál Ó'Hallin (Hvitserk), Cormac Melia (Ubbe), Carl Shaaban (Jesus), Mark Fitzgerald (Warrior)
• Written By: Michael Hirst
• Directed By: Ken Girotti