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Zemeckis describes the casting change as, “this horrific decision; it was heartbreaking for everybody.”
When he began to realize his lead actor was a problem, he went to producer Steven Spielberg with the footage.
“(Zemeckis) showed me the first five weeks of shooting that he had put together,” Spielberg said. ” And he said, ‘I just don’t think we’re getting the laughs I was hoping we would get.’ “
Spielberg said he realized his director “was absolutely correct.”
Thankfully Zemeckis and Spielberg were able to convince the studio to let them re-shoot with a new actor. Michael J. Fox joined the cast and an icon was born.
The clip is part of the extra’s package for the new BluRay edition of the classic trilogy.