The title refers to an astronomical phenomenon that might bring about the end of the world. The only scientist who knows for certain what's in store for mankind is brutally murdered, bringing Steed and Cathy in on the case. As the Avengers elude various villains and sidestep government cover-ups in order to get to the truth, the "dwarf" -- actually a meteor -- draws nearer and nearer to the Earth. An interesting precursor to the X-Files school of justifiable paranoia, "The White Dwarf" was written by Malcolm Hulke. First seen in England on February 16, 1963, the episode made its American TV debut exactly 28 years and nine days later. ~ Hal Erickson, Rovi