Continuity mistake: The intro sequence shows Landon on a desert road walking toward the camera. There are no mountains or hills visible that are nearby. Suddenly when Victor French shows up there are mountains and hills.
Suggested correction: While it is true, during opening sequence, Jonathan is walking in desert. When the camera shifts to Mark, it is implied that much time has passed by the time Mark comes upon the pedestrian, Jonathan, who by this time is coming into hill country, soon to become mountain country.
Another Song for Christmas - S1-E13
Continuity mistake: After Honest Eddy swaps cars with the old couple, there is a shot with him in the car. There is no smoke coming out of the back. Change angles, and smoke is coming out again.