The Mission Church in the episode is still located at Old Tucson Studios and was also used in John Wayne's movie. El Dorado.
"Ransom for a Nun" was first broadcast on October 18, 1958. The 22 year old guest star, Claire Griswold, plays "Sister Grace". Ms. Griswold married a very young (24 year old) Sydney Pollack less than 1 month before this (September 22, 1958). Pollack became one of America's best and most successful film directors. Sydney Pollack and Claire Griswold remained married until Pollock's death in 2008. They were married nearly 50 years.
Josh reveals he was named after an uncle who battled the bottle -- and lost.