The revival emphasized crime prevention and outreach to the public. Its attempts to address the contemporary youth-drug culture (such as the revival's first episode, "The LSD Story", guest-starring Michael Burns as Benjamin John "Blue Boy" Carver, voted 85th-best TV episode of all time by "TV Guide" and TV Land) have led certain episodes on the topic to achieve cult status due to their strained attempts to be "with-it", such as Joe Friday grilling "Blue Boy" by asking him, "You're pretty high and far out, aren't you? What kind of kick are you on, son?" Don Dubbins, who had acted alongside Webb in "The D.I." in 1957, was another featured actor in Mark VII Limited programs beginning in the 1960s. In 1968, Webb and his production partner R.A. Cinader launched "Adam-12" on NBC. A spinoff of "Dragnet," "Adam-12" starred Martin Milner and Kent McCord as a pair of LAPD beat cops, and followed their escapades while on patrol. Running till 1975, for a total of seven seasons, "Adam-12" was Webb's second-longest running television series, with the eight seasons recorded by the original "Dragnet" being the longest. Also in 1968, Webb and Johnny Carson performed a sketch on "The Tonight Show" that has since become known as the "Copper Clapper Caper" sketch. Webb, in character as Joe Friday, was working on the case of a robbery at a school-bell factory. Carson played the owner of the factory and victim of the theft, which consisted of each bell being relieved of its clapper (the device that makes the bell ring). The sketch's dialogue consisted of Webb and Carson discussing the situation in deadpan style and using alliteration and tongue twisters to describe the incident, each word having either a "c" or "cl" sound at the beginning. Both Webb and Carson tried desperately not to lose composure, but both did, near the end of the sketch. In 1970, Webb decided to bring an end to "Dragnet" and cease acting to focus on expanding Mark VII Limited's production profile. In 1971, Webb entered the world of district attorneys and federal government work with two series. The first, "The D.A.", starred Robert Conrad and Harry Morgan as a pair of Los Angeles County ADAs, with Conrad playing a junior ADA and Morgan his superior.