Robert Zemeckis’ best films were box office hits that helped put the American filmmaker’s name on the map like Forrest Gump, the Back to the Future films, and Who Framed Roger Rabbit. With his top box office flick being 1994’s best picture winner Forrest Gump,

So while much of the scene may be set in the 1960s, where a teenage boy (Tom Hanks, courtesy of de-aging CGI — more on that in a bit!) introduces squabbles with his drunk dad (Paul Bettany), an inner frame might reveal the families who came before.

Legendary director Robert Zemeckis explains why Here, his new movie starring Tom Hanks, is possibly the most difficult film he's ever made.