: At the titular Crater of Needles, Barbara Wright and her Menoptra ally, Hrostar, are forced into slave labor. The Crater is a desolate location where the Zarbi (giant ant-like creatures) force captured Menoptra to work until they die, often mutilating them so they can never fly again.

is the 19th episode of the second season of Doctor Who (1963), originally aired on March 6, 1965. It serves as the fourth part of the six-episode serial "The Web Planet" . Plot Overview

: In the Carcinome, the Animus —a malevolent, spider-like entity—uses the Doctor to locate the landing site of the Menoptra invasion force. The Doctor realizes the Animus uses gold to channel its mesmerizing influence and begins working on a way to counteract its control. Production & Legacy "Doctor Who" Crater of Needles (TV Episode 1965) - IMDb