The "Sit, Ubu, sit! Good dog!" commercial aired in 1984

It was the closing tag for Ubu Productions, the independent production company founded by Gary David Goldberg. The tag featured a photo of Goldberg's black Labrador retriever, Ubu Roi, with a frisbee in his mouth.
Explanation
The tag was a tribute to Goldberg's beloved dog, who died in 1984.
The tag was often heard at the end of episodes of the TV show Family Ties in the 1980s.
Goldberg also produced Brooklyn Bridge and Spin City.
Goldberg died in 2013 from a brain tumor.