The tattoo was a chronolock, a countdown to Rigsy's death by Quantum Shade, a powerful creature that had taken the form of a raven that Ashildr used to keep order. The trio eventually found the street, and the community's mayor, Ashildr, who had been forced to place the tattoo on Rigsy's neck as punishment for a murder that he didn't remember committing. During the search, the Doctor, who often referred to Rigsy by dismissive nicknames such as "Local Knowledge", actually allowed him to take control of the TARDIS for a short time. On the trail of the person who placed the tattoo on Rigsy's neck, the Doctor started a search for a " trap street", a hidden street harbouring alien refugees in the heart of London. He used the TARDIS telephone number which Clara had given him for emergancies to call Clara, telling her that a tattoo had appeared on his neck and was counting down. Rigsy later moved to central London, where he lived with Jen and had a child called Lucy. Later, he bid farewell to the Doctor and Clara, going off to see his gran. Rigsy later used his artistic skills to create a fake door, tricking the Boneless into charging the TARDIS. Clara, however, used a headband to restrain the lever allowing the train to run with nobody inside and saved Rigsy from an unnecessary demise. The train needed a person to hold the dead man's lever in place in order to run. When the Boneless attacked, Rigsy attempted to sacrifice himself by ramming an empty subway commuter train into them. His criminal activity saw him sentenced to community service, where he met Clara Oswald and helped her in her investigation of the recent disappearances, of which his aunt was one. Joivan Wade Memorable moment Behind the scenes video Rigsy was a graffiti artist from Bristol.