On which novel is the 1965 film with a character Agent Zeke Kelso based?
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!:  The film was based on the 1963 novel "Undercover Cat" by Gordon and Mildred Gordon and was directed by Robert Stevenson.
Undercover Cat