On January 27, 1967, "The Walls of Jericho" was interrupted several times by ABC News bulletins before the network stopped showing it altogether. The reason: Apollo 1 astronauts Gus Grissom, Edward H. White II, and Roger B. Chaffee were killed by a flash fire that spread through their space capsule during a launch pad test at Cape Kennedy. The astronauts were scheduled to be launched into space on February 21, 1967.
This is an unusual story when compared to all of the other Time Tunnel plots. Normally, the intervention of Doug and Tony have a minimal effect on the historical record. However, in this one they actually become a part of the Holy Scripture. In chapters 2 and 6 of Joshua, the story is told of how two spies left Joshua's camp and entered Jericho, where they met Rahab, who hid him them on the roof, and as a reward was promised safety when the city was attacked. All of this happens in this story. The end result of which means that Doug and Tony are now the two people who are (anonymously) written about in the Bible.
Per the title, the Walls of Jericho fell down upon the command of God according to the biblical book of Joshua (in its 6th chapter) after the Israelites walked around the city and the trumpets sounded. In 2021, the original city of Jericho is a earthen mound in which archaeological excavations have been performed for over a hundred years.
In the previous episode, Ann says that as a scientist, she must be open to the idea of ghosts; however, in this episode, she says that at as a scientist, she cannot believe in biblical miracles.