10 Best Robin Williams Performances Of All Time

10. Walter Finch - Insomnia (2002)

After blowing everyone away with his second feature film Memento, Christopher Nolan returned to the directing chair with Insomnia, a terrifying psychological thriller starring Robin Williams as murder suspect Walter Finch, and Al Pacino as the troubled detective on his tail.

In the film, Finch is presented as a small-town crime writer, whose involvement in the murder of his fan Kay (Crystal Lowe) seems unlikely given his unassuming demeaner.

The brilliance of Williams' performance lies in how perfectly it contrasts Pacino's increasingly paranoid turn as a detective losing his mind and his integrity. Williams plays Finch straight and ordinary, but as the investigation heats up, his unflappable persona gives way to something more sinister and dangerously mysterious than expected.

A performance in subtly, Williams' time as Finch proved the actor could play the villain just as well as he could pull-off the lovable hero.