Long before X-Files, the Invaders, struck paranoia of a secret invasion of beings from another world. Each week we followed the story of David Vincent who is convinced that earth is being invaded, but each week his attackers evaporate and no evidence is left behind of their presence. This series which ran in 1967-1968 is considered by many to be one of the best sci-fi shows ever. Now this May we will once again be invaded by this series as it comes out in DVD for the first time.