The comic book young Mark is reading on the bridge is Superman issue No. 1 (July 1939). It sold for $2.6 million in Dec 2021.
In this episode, Michael Landon's character Jonathan Smith uses a divining rod to find water. In the 1958 film "God's Little Acre", Michael Landon's character Dave Dawson uses a divining rod to find gold.
Jonathan who said he doesn't need to eat because he's an angel actually eats.