When most people hear the word technology they think of computers, mobile phones or the masses of technological advancements that have been developed since the twentieth century. Technology is simply the applied use of scientific knowledge, and its evolution during the time of the Bow Street runners can be tracked through distinct criminal cases and events throughout the period. Through the exploration of the Cato Street Conspiracy, murder of Elsie Batten and staged robbery of Joseph Randall, it is evident that technology was essential to Bow Street Runners and hugely aided the solving of crimes.