RiffTrax is a comedy series created by the original cast of Mystery Science Theater 3000 (MST3K), including Mike Nelson, Kevin Murphy, and Bill Corbett. It features humorous commentary over popular movies and television shows, which viewers can sync with their own copies of the films. The commentary is available for download or streaming, allowing fans to enjoy the jokes while watching the movies. The format of RiffTrax is similar to MST3K, where the hosts provide witty and often absurd commentary, poking fun at the film's plot, characters, and production quality. RiffTrax covers a wide range of films, from cult classics to recent blockbusters, making it accessible to a diverse audience.