The TARDIS is drawn by a mysterious force and lands on the alien planet Vortis. There the Doctor, Ian, Barbara and Vicki find themselves caught up in a war between an evil force known as "The Animus", its ant-like Zarbi allies, and the butterfly-like Menoptra race and their allies the subterranean Optera.
Daniel Williamson [edited]
Did You Know?
Originally, the Zarbi had the ability to spit venom. See more
When Vicki awakes alone a shadow can be seen moving to the right of her. See more
Whatever force has got hold of the TARDIS has taken your pen!