Giga Shadow.

To resupply the protoblood that sustains Kai's life, the crew of the Lexx travel back to the Cluster but find the planet deserted. The population was killed in "The Cleansing", in preparation of the birth of the Giga Shadow, the last survivor of the insect wars and sworn enemy of humanity. The crew try to destroy the Giga Shadow with the help of Yottskry (played by guest star Malcolm McDowell), a defecting priest of the Divine Order.