The Public Surveillance Unit or PSU is a fictional institution in the Judge Dredd comic strip in 2000 AD. It was introduced in progs (issues) 954 and 959 (1995). Notable PSU characters in the comic strip are Judge Niles, its chief, and Judge Roffman, who frequently assists Judge Dredd in surveillance, espionage and tracking criminals. Former PSU-chief Judge Edgar was also a recurring character and a rival of Dredd.