High Quality Content by WIKIPEDIA articles! Yancy Derringer is an American Western series that ran on CBS from 1958 to 1959, with Jock Mahoney (1919–1989) in the title role. It was produced by Derringer Productions and filmed in Hollywood by Desilu Productions. Derringer Productions consisted of half interest for Warren Lewis and Don Sharpe as executive producers, and a quarter interest to Jock Mahoney for starring in the series, and a quarter interest to Richard Sale and Mary Loos, husband and wife, as creators.