Harlequin, known as Dark Forces in the USA, is a 1980 Australian film starring Robert Powell, Carmen Duncan, David Hemmings and Broderick Crawford. The film is a modern-day version of the Rasputin story; the major characters have the same first names as Rasputin and the Romanov royal family, and their family name 'Rast' is simply 'Tsar' backwards.

A modern-day politician is faced with an incomprehensible in this mystical-fantasy. Senator Rast is a very powerful man. But his is nothing compared to the extraordinary power of the enigmatic stranger who mysteriously comes to "visit" him. Possessing uncanny magical prowess and miraculous psychic abilities, the peculiar, but seemingly benevolent, visitor quickly gains a spell-binding hold over the senator and his family. But a power-lusting political backer is also vying for control over the up-and-coming senator. And he would kill the influential stranger, without question, for that power. But he and the senator are about to be enlightened. Written by Rone Barton Lokarr 

Robert Powell as Gregory Wolfe
David Hemmings as Nick Rast
Broderick Crawford as Doc Wheelan
Carmen Duncan as Sandy Rast
Alyson Best as Alice
Alan Cassell as Mr Porter
Mark Spain as Alex Rast