Benedict Cumberbatch is used to playing characters with mental prowess but for his role as Marvel superhero Doctor Strange in last November’s, er, Doctor Strange, he had to beef himself up physically too.

In a new promo for the movie’s home video release, the cast and crew of the film talk about Benedict’s intensive training regime for the movie. It was made even tougher by the fact that he apparently squeezed it in during the filming for the movie in the daytime and then his stage run as Hamlet in the evening.

Watch the promo below:

Doctor Strange is available for digital download on February 14 and then on Blu-ray and DVD on February 28th.