Check this superb film noir where John Hurt plays one of my favourite onscreen icecool hitmen.
The Hit (1984)
Director: Stephen Frears
From Time Out Film Guide
After ten years meditating on his new life down in Spain, supergrass Willie Parker (Stamp) is rudely awakened by some visitors - two hit men come to take him back to Paris to settle a few scores. But Willie is a changed man, completely unfazed by the imminence of death, and it is the killers whose nerves are stretched on the long road back to 'the hit'. Frears returned here to the big screen thirteen years after Gumshoe and a retreat to the stunting effect of TV; the wide, sunlit plains of Spain seem to have broadened his horizons, allowed a flexing of cinematic muscle, and inspired him to something both exciting and lofty. Hurt is in good vicious form as the shaded hit man; Stamp once more wears a smile like a halo; and the prospect of approaching death is handled without too much metaphysical puffing and blowing. All in all, a very palpable hit.