Armstrong also appeared on The Twilight Zone, in the episode "Nothing in the Dark" along with a young Robert Redford.
Dark Horse Comics | Dark Shadows | Orchestral Manoeuvres in the Dark | The Dark Knight Rises | Dark Avengers | The Dark Side of the Moon | Poker After Dark | Transformers: Dark of the Moon | Dark Victory | Dark Funeral | dark energy | The Old Dark House | The Dark Tower (series) | The Dark Tower | My Beautiful Dark Twisted Fantasy | Dark Star Orchestra | Thor: The Dark World | Star Wars: Dark Forces | Perfect Dark Zero | Greek Dark Ages | Elvira, Mistress of the Dark | Dark Knight Court | Dancer in the Dark | Damon Dark | Alone in the Dark | Under Siege 2: Dark Territory | The Dark Avenger | The Dark | Star Wars Jedi Knight: Dark Forces II | Spider-Man: Turn Off the Dark |
He is also known for his work in television, writing screenplays for such noted series as The Twilight Zone, such as "Nothing in the Dark", "Kick the Can", "A Game of Pool" and "A Penny for Your Thoughts", and Star Trek, the first aired episode of the series, "The Man Trap".