The expeditionary party blasted through rock face of a cliff and found the entrance to the tomb of the Cybermen. After the doors had been de-electrified, it was found to be too heavy to move. Kaftan was unwilling to have Toberman open the doors as she did not want him to lose his life. Parry suggested they had only brought him along for purposes such as these. The Second Doctor was able to play on Toberman's pride to have him open it, accusing him of being afraid. He complied, granting them access.