[s4e19] On The | Eve

is the nineteenth episode of the fourth season of the historical drama series Vikings , which first aired on January 25, 2017. The episode was written by series creator Michael Hirst and directed by Ben Bolt . Key Plot Features

: The episode features the first appearance of Jonathan Rhys Meyers as the warrior-bishop Heahmund, a character intended to serve as a foil for Ivar in subsequent seasons. Production Elements [S4E19] On the Eve

: A central feature of the episode is Ivar the Boneless proving his worth as a strategist. He convinces his brothers to abandon traditional head-on tactics in favor of using the terrain to confuse and trap the English forces. is the nineteenth episode of the fourth season