While talking in the church with Charles about miracles, Rev. Alden claims never to have seen one in all his time in the clergy, but in the earlier episode The Faith Healer, Rev. Alden tells Charles that he saw the miracles the actual faith healers preformed.
When the psychiatrist is talking to Charles in the barn, Charles says to him "It's a shame you weren't around 2000 years ago, doctor. You could have saved Moses that long climb up Mount Sinai." However, it would have been more than 3000 years ago when Moses climbed Mount Sinai.
When Isaiah is leaving Caroline's restaurant at the 39:54 mark he says to dress warm a storm is brewing. Yet when he opens the door to leave none of the trees are blowing in the wind yet you can hear it.
Charles Ingalls beard looks real at first with the appropriate graying. In the ending it's definitely fake and black.
Mr. Ingalls appears from the loft stating he was able to feed James broth with some "device" the doc gave him. The only means of feeding comatose patients is with feeding tubes or IV. They cannot take food by mouth.
The scene at 12 min mark has been used in 2 episodes from previous seasons. Bandit's doghouse is missing from the yard.