Hollywood is full of tantalising “what-if?” moments; decisions made on the spur of the moment that have far-reaching repercussions for all involved. What if Robert Zemeckis had persevered with Eric Stoltz on the Back to the Future set, rather than bringing in Michael J Fox? What if Tom Selleck had played Indiana Jones instead of Harrison Ford? What if, as initially wanted by the film’s producers, Robert Altman had directed Alien?
And now we can add another big mystery to the list. What if David Schwimmer had starred in Men in Black instead of Will Smith?
