He came to Scarman's house despite Ibrahim Namin's orders to Collins not to admit anyone and demanded to know why Namin had forbidden Marcus's brother from entering the house. Namin tried to show him a letter supposedly written by Marcus explaining why no one could be admitted, but Warlock rejected it, declaring it to be a forgery. Warlock then threatened to go to the police if he was not given a satisfactory explanation to his inquiry. He said that he had been following up on it himself, making a number of inquires in Cairo. However, their conversation was interrupted by a scream coming from one of the backrooms. Rushing in, they found that it was Collins, who had been strangled. Warlock wanted to go to the police, but he was shot by Namin so that he could tell no one. However, the Fourth Doctor and Sarah Jane Smith prevented the shot from killing him.
With Warlock still suffering from a bullet wound, the Doctor carried him to Laurence's lodge, narrowly evading the mummies. He was given aid there and retired to a sofa. Later, while the Doctor, Sarah and Laurence were investigating, Marcus entered the lodge and had one of the mummies kill Warlock. (TV: Pyramids of Mars)