CBS Cop Show is a term used to describe two popular police procedural television series that aired on CBS. The first show is 'Baretta' which ran from 1975 to 1978 and starred Robert Blake as Tony Baretta, a streetwise undercover detective. The second show is 'CSI: Crime Scene Investigation' which ran from 2000 to 2015 and starred William Petersen as Gil Grissom, a forensic scientist who leads a team of investigators in solving crimes. Both shows were highly successful and remain popular today.