What Gordon and Mildred Gordon novel was made into a movie in which a character named Agent Zeke Kelso was portrayed?
Dean Jones (actor): Dean Carroll Jones (January 25, 1931 – September 1, 2015) was an American actor best known for his roles as Agent Zeke Kelso in "That Darn Cat! That Darn Cat!: That Darn Cat! That Darn Cat!:  is a 1965 American Walt Disney Productions thriller comedy film starring Hayley Mills (in her last of the six films she made for the Walt Disney Studios) and Dean Jones (starring in his first film for Disney) in a story about bank robbers, a kidnapping and a mischievous cat. That Darn Cat!:  The film was based on the 1963 novel "Undercover Cat" by Gordon and Mildred Gordon and was directed by Robert Stevenson.
"Undercover Cat"