The film "Marathon Man" does not feature any identifiable LGBTQ+ characters or themes. The narrative focuses on a graduate student caught in a thriller involving a Nazi war criminal and stolen diamonds, with no elements related to queer identity present in the plot or character arcs.

The film "Marathon Man" does not feature any identifiable transsexual characters or themes. Its narrative focuses on espionage, a Nazi war criminal, and a graduate student caught in a dangerous conspiracy, with no elements related to transgender identity.

The film does not feature any scenes where a female character engages in and wins close-quarters physical combat against one or more male opponents. Female characters are present but are not depicted in such combat roles.

The 1976 film "Marathon Man" is a direct adaptation of William Goldman's 1974 novel. All major characters retain their original genders from the source material, with no instances of a character established as one gender being portrayed as another.

The 1976 film "Marathon Man" is an adaptation of William Goldman's novel. The main characters, including Thomas Levy, Dr. Christian Szell, and Elsa Opel, are portrayed by actors whose race aligns with their established depictions in the source material. No characters who were canonically or historically established as one race are portrayed as a different race.