The Silence is a religious movement, often characterized by an alien species resembling the person from Edvard Munch's The Scream. Their religion is based upon the phrase: 'Silence will fall when the question is asked.' The question in particular is unknown, but Namor theorises that it may involve the Doctor's origin, which is eventually proven to be correct as the question i: Doctor who? When Melody was a infant they kidnapped her and trained her to be the assassin of the Doctor, a goal she eventually achieves in the series X-Men: End of Time. The particular species has the unique ability to be forgotten after being looked at, like the Weeping Angels who can only move when not seen. Their species and origin is unknown.