In 1965, Cosby was cast alongside Robert Culp in the I Spy espionage adventure series on NBC. I Spy became the first weekly dramatic television series to feature an African-American in a starring role. At first, Cosby and NBC executives were concerned that some affiliates might be unwilling to carry the series. At the beginning of the 1965 season, four stations declined the show; they were in Georgia, Florida, and Alabama. Viewers were taken with the show's exotic locales and the authentic chemistry between the stars, and it became one of the ratings hits of that television season. I Spy finished among the twenty most-watched shows that year, and Cosby would be honored with three consecutive Emmy Awards for Outstanding Lead Actor in a Drama Series. When accepting his third Emmy for the show, Cosby told the audience: "Let the message be known to bigots and racists that they don't count!"  During the series run, Cosby continued to do standup comedy performances and recorded a half dozen record albums for Warner Bros. Records. He also began to dabble in singing, recording Silver Throat: Bill Cosby Sings in 1967.  In June 1968, Billboard reported that Cosby had turned down a five-year, US$3.5 million contract renewal offer and would leave the label in August that year to record for his own record label.  In July 1968, Cosby narrated "Black History: Lost, Stolen, or Strayed", a CBS documentary addressing the representation of blacks in popular culture. Andy Rooney wrote the Emmy awarded script for Bill Cosby to read. Michael Eric Dyson said it was one of "the rare exceptions when Cosby took off the gloves and blinders, to discuss race in public with candor and discernment." Due to its popularity and controversial nature, it was rebroadcast less than a month later.  Tetragrammaton Records was a division of the Campbell, Silver, Cosby (CSC) Corporation, the Los Angeles-based production company founded by Cosby, his manager Roy Silver, and filmmaker Bruce Post Campbell. It produced films as well as records, including Cosby's television specials, the Fat Albert cartoon special and series and several motion pictures. CSC hired Artie Mogull as President of the label and Tetragrammaton was fairly active during 1968-69 (its most successful signing was British heavy rock band Deep Purple) but it quickly went into the red and ceased trading during 1970.

Answer this question "Did copsy latter leave I spy" by extracting the answer from the text above.
I Spy finished among the twenty most-watched shows that year, and Cosby would be honored with three consecutive Emmy Awards