The film "Murder on the Orient Express, 1974" does not feature any identifiable LGBTQ+ characters or themes. The narrative focuses on a classic whodunit mystery, with character motivations and relationships not exploring queer identities or experiences.

The film "Murder on the Orient Express, 1974" does not feature any identifiable transsexual characters or themes. The narrative is a classic whodunit mystery, with character arcs and plot points entirely unrelated to gender identity or transition, thus resulting in no depiction.

The movie does not contain any action or adventure elements.

The 1974 film "Murder on the Orient Express" is a faithful adaptation of Agatha Christie's novel. All major characters retain their original gender from the source material, with no instances of a character established as one gender being portrayed as another.

All major characters in the 1974 film adaptation of Agatha Christie's novel are portrayed by actors whose race aligns with the characters' established or implied race in the source material. No instances of a character canonically established as one race being portrayed as a different race were identified.