Avengers director Joss Whedon: 'There was doubt'
After two years in the making, Avengers sequel Age of Ultron was released in the UK on 23 April and is out in the US on 1 May.
The BBC's Lizo Mzimba went behind the scenes to meet the writer and director of the film Joss Whedon.
25 Apr 2015
- From the section Entertainment & Arts