Thomas Francis “Tom” Wilson Jr. is an American actor, writer, musician, painter, voice-over artist, comedian, and podcaster. He is known for his voice-over work in video games, movies, and TV shows. He is also known for playing Biff Tannen, Griff Tannen and Buford “Mad Dog” Tannen in the Back to the Future trilogy, and Coach Ben Fredricks on NBC’s Freaks and Geeks.