The Vanishing Ray is a comic strip starring Lady Penelope that appeared in TV Century 21 comics. It also appeared in the fourth book of the 1992 Thunderbirds Comic album called "Lift Off" and the Thunderbirds Comic Collection Volume 1. Penelope receives a strange invisible ray projecting torch in the post, with no clue of who sent it to her. But this is just the beginning of the trouble when two powerful adversaries are also interested in the device...