▁D . I . ▁in ▁ 1 9 5 7 , ▁was ▁another ▁featured ▁actor ▁in ▁Mark ▁VII ▁Limited ▁programs ▁beginning ▁in ▁the ▁ 1 9 6 0 s . ▁ ▁In ▁ 1 9 6 8 , ▁Web b ▁and ▁his ▁production ▁partner ▁R . A . ▁Cin ader ▁launched ▁Adam - 1 2 ▁on ▁N BC . ▁A ▁sp ino ff ▁of ▁Drag net , ▁Adam - 1 2 ▁star red ▁Martin ▁Mil ner ▁and ▁Kent ▁McC ord ▁as ▁a ▁pair ▁of ▁L AP D ▁beat ▁c ops , ▁and ▁followed ▁their ▁esc ap ades ▁while ▁on ▁pat rol . ▁Running ▁till ▁ 1 9 7 5 , ▁for ▁a ▁total ▁of ▁seven ▁seasons , ▁Adam - 1 2 ▁was ▁Web b ' s ▁second - long est ▁running ▁television ▁series , ▁with ▁the ▁eight ▁seasons ▁recorded ▁by ▁the ▁original ▁Drag net ▁being ▁the ▁longest . ▁ ▁Also ▁in ▁ 1 9 6 8 , ▁Web b ▁and ▁Johnny ▁Car son ▁performed ▁a ▁sketch ▁on ▁The ▁Ton ight ▁Show ▁that ▁has ▁since ▁become ▁known ▁as ▁the ▁" Co pper ▁Cla pper ▁Cap er " ▁sketch . ▁Web b , ▁in ▁character ▁as ▁Joe ▁Friday , ▁was ▁working ▁on ▁the ▁case ▁of ▁a ▁rob ber y ▁at ▁a ▁school - bell ▁factory . ▁Car son ▁played ▁the ▁owner ▁of ▁the ▁factory ▁and ▁victim ▁of ▁the ▁the ft , ▁which ▁consisted ▁of ▁each ▁bell ▁being ▁rel ieved ▁of ▁its ▁cla pper ▁( the ▁device ▁that ▁makes ▁the ▁bell ▁ring ). ▁The ▁sketch '