9 Movies That Succeeded By Ignoring The Source Material

Another major science fiction entry, Ridley Scott's 1982 classic is an adaptation of "Do Androids Dream of Electric Sheep", written by genre visionary Phillip K. Dick.

While the idea of a film adaptation had been tossed around for many years, Phillip K. Dick wasn't too trustful of the Hollywood system, having not been reached to contribute to the film adaptation. The book mainly follows Rick Deckard in his hunt for the replicants, but also features a role with John Isidore who helps the androids to elude the detective.

Isidore's side of the tale offered an alternative perspective on the proceedings, his interactions with the androids showing their more inhuman side. Yet it received little conclusion or payoff. The film's best decision was to drop this half of the book and humanise the androids instead, most notably with Rutger Hauer's iconic tears in the rain monologue.

It leaps beyond its origins in "Do Androids Dream of Electric Sheep" to create a dazzling sci-fi world that still resonates today.

In spite of both differences from the source material and multiple cuts in its production, Blade Runner remains one of the most arresting and influential sci-films ever produced and it did so without the original book word-for-word.