Listen to the sound clip Who is it? from Dennis Hopper Sounds: The Twilight Zone: Who is it? Who is it? This sound is from Dennis Hopper Sounds: The Twilight Zone Dennis Hopper Soundboard from an episode of The Twilight Zone called He's Alive. Audio includes ranting against communists, making accusations, conspiracies, and more. Go to the full soundboardwith more sound clips Search