When the British government decided to allow only one correspondent into the London Underground to cover the British Army's fight against the Great Intelligence and its robot Yeti, Chorley was selected for the job. At first he was proud to be chosen for this unique assignment, but when he realised the danger he was in, he panicked and attempted to flee. His disappearance caused several people, including Jamie McCrimmon, to suspect him of working for the Great Intelligence. During the crisis, he met Colonel Alistair Gordon Lethbridge-Stewart. (TV: The Web of Fear)