In 1966, after 14 years . . .

. . . The Adventures of Ozzie & Harriet went off the air.  One of television's early long-running success stories, the cancellation of the show left a gap in ABC's schedule.  What would be put in its time slot?  Would the new show have half the impact of the program it was replacing?  Well, not only was the answer a solid "YES!", but the mid-season replacement would make a massive cultural mark not just on the sixties, but on american, and world, pop culture to this day. What was the name of this explosive new show?  Why, it was . . .