In 1892, he congratulated Madame Vastra on cracking a case. He seemed to understand Vastra explaining about her being a Silurian and Strax being a Sontaran, but he seemed somewhat confused afterward. (TV: Vastra Investigates)
Not much longer after, Vastra sent Gregson and other officers to take care of the Clockwork Droids at the Mancini's Family Restaurant. However, when they went inside and found the droids scattered across the floor, they were too afraid to do anything. Later, in astonishment, they watched as the Half-Face Man's balloon made out of human skin rose out of the restaurant. (TV: Deep Breath)
Behind the scenes Edit
Madame Vastra and Jenny Flint's adventures share a lot of parallels with Sir Arthur Conan Doyle's Sherlock Holmes stories. One of these is the name of Inspector Gregson, whose name comes from the credits of Deep Breath. He shares his surname with Tobias Gregson, who was an inspector from the original Sherlock Holmes novels.