Dr. Mabuse the Gambler (German: Dr. Mabuse, der Spieler) is the first film in the Dr. Mabuse series about the character Doctor Mabuse who featured in the novels of Norbert Jacques. It was directed by Fritz Lang and released in 1922. The film is silent and would be followed by the sound sequels The Testament of Dr. Mabuse (1933) and The Thousand Eyes of Dr. Mabuse (1960). It is four and a half hours long and divided into two parts, originally released a month apart: Der große Spieler: Ein Bild der Zeit and Inferno: Ein Spiel von Menschen unserer Zeit.