son of King Horik Georgia Hirst as Torvi, the widow of Jarl Borg and the new wife of Erlendur Greg Orvis as Earl Siegfried, one of the Viking commanders in the siege of Paris Frankie McCafferty as Sinric, a polyglot drifter Owen Roe as Count Odo of Paris Morgane Polanski as Princess Gisla of West Francia, the daughter of Emperor Charles Huw Parmenter as Roland, Count Odo's first-in-command and Therese's brother Mark Huberman as Louis, a soldier in Paris Karen Hassan as Therese, Roland's sister and Count Odo's mistress Guests Ian Beattie as King Brihtwulf of Mercia Ivan Kaye as King Aelle of Northumbria Elinor Crawley as Thyri, Earl Haraldson and Siggy's daughter Søren Pilmark as Stender, a farmer who escaped Wessex after Aethelwulf's raid Eddie Drew as Odin, appearing in Ragnar's visions Carl Shaaban as Jesus, appearing in Ragnar's visions James Murphy as Ansgar, a monk who is trying to convert Vikings in Kattegat Episodes Production Development An Irish-Canadian co-production presented by Metro-Goldwyn-Mayer, Vikings was developed and produced by Octagon Films and Take 5 Productions. Morgan O'Sullivan, Sheila Hockin, Sherry Marsh, Alan Gasmer, James Flynn, John Weber, and Michael Hirst are credited as executive producers. This season was produced by Steve Wakefield and Keith Thompson. Bill Goddard and Séamus McInerney are co-producers. The production team for this season includes casting directors Frank and Nuala Moiselle, costume designer Joan Bergin, visual effects supervisors Julian Parry and Dominic Remane, stunt action designers Franklin Henson and Richard Ryan, composer Trevor Morris, production designer Mark Geraghty, editors Aaron Marshall for the first, third, fifth, seventh and ninth episodes, and Tad Seaborn for the second, fourth, sixth, eighth and tenth episodes, and cinematographer PJ Dillon. Music The musical score for the third season was composed by Trevor Morris in collaboration with Einar Selvik and Steve Tavaglione. The opening sequence is again accompanied by the song "If I Had a Heart" by Fever Ray. The soundtrack album was released on May 15, 2015 by Sony Classical Records. Two additional pieces not included in the album are Selvik's original songs "Voluspá"—featured in "Born Again" and briefly incorporated in the score track "Floki Appears to Kill Athelstan"—and "Heljarlokk", written by Selvik and Lindy-Fay Hella and featured in "The Dead". "Voluspá" was released as a single by Wardruna on November 9, 2018. Additional non-original music by Norwegian music group Wardruna is featured in the episodes "The Wanderer", "Paris",