In "I, Robot" (2004), Sonny is not in lock-step with the other robots as he's being escorted, which subtly sets him apart as unique even during the most mundane actions. : r/MovieDetails
I, Robot”: What Do Robots Dream of? | Film Quarterly
IRobot Sonny Fan Art 3D model animated rigged | CGTrader
I, Robot | Monsters in Film and Literature
I, Robot by Isaac Asimov - Audiobook - Audible.com