Photo of Gale Gordon as principal Osgood Conklin and Richard Crenna as student Walter Denton from the television program Our Miss Brooks. (1955)The Bureau of Industrial Service for CBS-TV. In this era, ad and publicity agencies were often used by networks, program sponsors and studios to distribute publicity material. The Bureau, which was a division of ad agency Young & Rubicam, was widely used for this purpose by those in the industry., Public domain, via Wikimedia CommonsPhoto of Joan Blackman and Richard Crenna from the television program Slattery's People. (1965)CBS Television, Public domain, via Wikimedia CommonsPhoto of Kathleen Nolan and Richard Crenna as Kate and Luke McCoy from the television program The Real McCoys. (1960)ABC Television, Public domain, via Wikimedia CommonsPoster of American science-fiction film Marooned (1969).Unknown authorUnknown author, distributed by: Columbia Pictures, Public domain, via Wikimedia CommonsRichard CrennaImage via TMDBRichard CrennaImage via TMDBRichard CrennaJohn Mathew Smith & www.celebrity-photos.com from Laurel Maryland, USA, CC BY-SA 2.0, via Wikimedia Commons