The Zarbi Are Destroyed

After previously saving the Menoptera from the Zarbi, a group of Zarbi approach the Doctor, Ian and Barbara. As a glass cylinder makes it way around the Doctor's head the Menoptra states that they are about to speak to the Doctor. The Zarbi tell the Doctor that he is their prisoner and that they require his knowledge. In hopes to rescue the Doctor, Barbara takes Ian to look for the Zarbi brain centre.