- Alex Høgh Andersen (Ivar Lothbrok / Ivar the Boneless)
- Jordan Patrick Smith (Ubbe Lothbrok)
- Marco Ilsø (Hvitserk Lothbrok)
- Peter Franzén (King Harald Finehair)
- Georgia Hirst (Torvi)
- Danila Kozlovsky (Prince Oleg of Novgorod)
Vikings — S4E3
Episode: Mercy
Air Date: 2016-03-03
Runtime: 49 min
Overview
Floki learns of the 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.