The Dick Van Dyke Show

This was the sitcom that broke the mold when it came to the head of the household actually having a profession and showing him at work. For many years before this show premiered, you would always here about "dad" being at work but you would never hear what kind of work he did. In some cases you would even see them at home all the time (eg. Ozzie Nelson). This was the first show where you got to see the main character interact with his co-workers as well as his family at home. And very often the two would meet, especially in the classic episode "Coast to Coast Blabbermouth" when Laura almost cost Rob his job by revealing that Alan Brady wore a toupee. This show is just as funny today as it was when it first premiered in 1961.