"Tarzan", "Iron Horse", "Daktari", "Felony Squad", "The Girl From U.N.C.L.E.", "The Rat Patrol", "Shane","The Road West", "Time Tunnel", and "T.H.E. Cat" were all dramas that debuted in 1966. "My Three Sons" was a comedy. 1967 debuts included, "Dragent '67" "Ironside", "Mannix" and "The Prisoner". 1968 gave us the aformentioned "Adam-12", "The Bold Ones", "It Takes A Thief", "Hawaii 5-0", "Land of the Giants" and the Mod Squad". 1969 had "Bracken's World" (IIRC it took over Star Trek's Time slot), Marcus Welby M.D." and "Then Came Bronson". So no shortage of New dramas in the late 60s.In '66, "Mission Impossible" was the only other show to debut that one could label as a "drama." Of the remainder from the whole of the sixties, they had... "Flipper?" "Daniel Boone" and "Combat." "My Three Sons," I guess...
I was alive and watched most of those shows.