Conversation so far:
What show did Don Knotts star in?
Don Knotts was best known for his role as Deputy Sheriff Barney Fife on The Andy Griffith Show.
When did The Andy Griffith Show run for?
The Andy Griffith Show aired on CBS from October 3, 1960, to April 1, 1968, with a total of 249 half-hour episodes.
How did Don Knotts fit into The Andy Griffith Show?
Portrayed by Don Knotts, Barney Fife is a deputy sheriff in the slow-paced, sleepy southern community of Mayberry, North Carolina on The Andy Griffith Show.
Did Don Knotts win awards for The Andy Griffith Show?
Don Knotts's portrayal of the deputy on the popular show earned him five Emmy Awards.
What category did Don Knotts win Emmy awards for The Andy Griffith Show?
Don Knotts earned five Emmy Awards for Best Supporting Actor in a Television Comedy.
What did people say about Don Knotts's character on The Andy Griffith Show?
The Museum of Broadcast Communications describes Deputy Barney Fife as self-important, romantic, and nearly always wrong.
What did they say about Don Knotts' contribution to The Andy Griffith Show?
Andy Griffith later recalled that Don Knotts' contribution was the show's saving grace because he was uncomfortable with the original concept to have Andy Taylor being the comic lead.

Question: What did he do?
Self-contained rewrite: What did Don Knotts do in creating the character of Barney Fife?