Christopher Lloyd ‘unsure what he was doing’ during Back To The Future filming

Christopher Lloyd steps out of a DeLorean (Ian West/PA)

Back To The Future star Christopher Lloyd has said he remembers being “unsure what he was doing” while making the classic film.

The veteran actor, 82, is best known for playing Doc Brown in the trilogy of movies about Michael J Fox’s teenager Marty McFly, who travels back in time using the eccentric scientist’s time machine.