In 2015, Hemsworth starred in director Michael Mann's action thriller Blackhat, opposite Viola Davis, and reprised his role of Thor for the fourth time in the sequel to The Avengers, Avengers: Age of Ultron. Hemsworth returned to the set of Home and Away in November 2014 to film a scene as an extra and not as his character Kim Hyde. He appeared in the episode broadcast on 19 May 2015. Also in 2015, he co-starred in the comedy film Vacation, along with Ed Helms, a revival of the film series that originally starred Chevy Chase. His last 2015 film was In the Heart of the Sea, based on the book of the same name by Nathaniel Philbrick, with Hemsworth playing first mate Owen Chase. In an interview with Jimmy Kimmel, he revealed that to prepare for the role of starving sailors, the cast was put on a diet of 500–600 calories a day to lose weight. In 2016, Hemsworth reprised the role of Eric the Huntsman in The Huntsman: Winter's War and also portrayed Kevin the receptionist in Ghostbusters.