Robert Duvall's recent passing brings to light the often unspoken truth about the world of acting: some performers, despite starring in numerous films, are indelibly marked by a singular role. Duvall, whose career began in television and flourished with notable films such as THX 1138, became synonymous with a character that transcended typical movie roles. His portrayal as Tom Hagen in 'The Godfather', released in 1972 when Duvall was 42, defied overshadowing by the dominating presences of Al Pacino and Marlon Brando, thus securing his legacy in cinematic history.

In 'The Godfather', Duvall assumes the role of the "devil's lawyer"—a character that serves as more than just a legal advisor; he is the moral fulcrum between the greys of legality and the darkened blood ties within the Corleone family. Hagen, as the adopted son, commands authority within the family hierarchy without holding the prestigious Corleone surname, which complicates his position amidst the brutal realities of organized crime. His unique standing symbolizes the changing dynamics of power and loyalty within a family deeply entrenched in a violent legacy.

The narrative of the Corleone family evolves dramatically after the assassination attempt on Don Vito, with Duvall's character, Tom Hagen, emerging as a pivotal player who must navigate the treacherous waters of familial strife and external threats, including conflicts with figures like 'The Turk', Sollozzo. Duvall's portrayal captures the essence of a man ensnared between his adopted loyalty to the Corleone family and the moral dilemmas posed by his professional obligations, a balance that resonates with audience members even decades after the film's release.