Redheads were being murdered, and Alison went to the crime scene, and saw a vision of the Texas Ranger from the first episode, and he told her where to find the evidence.

Then he came to Arizona to help with the investigation, because they had an unsolved string of murders in Texas, and he thought it was the same guy. The killer was leaving clues with a Bible quote, Isaiah something (not good with the Bible quotes!) The Ranger appeared to Alison in a dream and told her the victims were related. Then he landed in the hospital with heart problems, and they were going to do surgery on him.

The Arizona cops discovered the victims had the same father. At least the two Arizona ones. Can't remember about the Texas ones.

Alison and her husband were arguing a lot about her weird work hours. She was at the hospital with the Ranger and she told him she'd see him in the morning after his surgery. Then she left, and he cut all his wires with nail clippers and died. Then we saw the "to be continued..." on the screen.