Clarence Williams III ( born August 21 , 1939 ) is an American actor who is perhaps best known for his role as `` Linc Hayes '' on the iconic `` hippie '' cop show `` The Mod Squad '' ( 1968-1973 ) .
Clarence Williams III ( born August 21 , 1939 ) is an American actor . He is best known for his role as `` Linc Hayes '' on the iconic `` hippie '' cop show `` The Mod Squad '' ( 1968-1973 ) .