Conversation so far:
What are the names of the Smother's brothers?
Thomas and Richard Smothers
Where were Thomas and Richard Smothers born?
The brothers Thomas and Richard Smothers were both born on Governors Island in New York Harbor
Who was the Smothers brother's father?
Thomas B. Smothers, Jr.
Did the Smothers Brother's go to school?
They graduated from Redondo Union High School in Redondo Beach, California, and attended San Jose State University
When did the Smothers Brothers get into show business?
in February 1959
Did the Smothers Brothers do any stage shows after they got into show business in 1959?
The Purple Onion in San Francisco.

Question: When did they start coming on TV?
Self-contained rewrite: When did the smothers borthers start coming on TV after performing on stage at the purple onion in San francisco?