Coy and Vance: Duke of Hazzard
When you hear the term Coy and Vance, people are talking about producers shoehorning in characters to replace popular main characters.
From IMDB, ((During the 1981-82 season, John Schneider and Tom Wopat demanded pay raises, claiming that they earned and were owed a lot of royalties from the show's extensive line of merchandise. They ended up walking out, and the producers replaced the characters of Bo with Coy and and Luke with Vance for the 1982-83 season, ))
Coy and Vance were so bland and boring that everyone stopped watching the show. I am sure Schneider and Wopat were laughing when that season went on. I remember getting very upset with the change in cast. Catherine Bach wanted to leave too, but the show would have been canceled.
The show explained that Bo and Luke left Hazzard to become racers. Wait, aren't they on parole?
After the rating fell, the producers brought back Luke and Bo. And, Coy and Vance were completely forgotten.
I just love how Coy and Vance were promptly written out of the show will little or no transition.