New discoveries reveal the secret dangers lurking in the cosmos. This episode is a mashup of "Space's Deepest Secrets," S03E02, "When Meteors Attack" and "How the Universe Works," S05E05, "The Universe's Deadliest".

New discoveries shed new light on dark matter, one of the universe's biggest mysteries. This episode is a mashup of "Space's Deepest Secrets", S02E06, "Curse of Dark Matter" and another Science Channel show "How the Universe Works", S05E07, "The Dark Matter Enigma."