May the Road Rise Up - S7.E16

The Simons' world turns upside down when the brothers discover the car that their father had died in was driving down the street. They stopped the driver to discover it was indeed their father's car, but he knew nothing - it had been bought at an auction the month before. Cecilia wouldn't believe the boys at first, but they finally convinced her it was the same car. While she and Rick couldn't believe he was still alive, AJ clung to the hope that he was, to the point of striking his brother. Both were horrified by how close they'd come to really hurting each other and resumed their search for the truth. After a long, frustrating search, they finally discover that Jack Simon hadn't died in a fiery car crash on a rainy night. He'd actually died months later of radiation poisoning, contracted when he was stopping some terrorists of stealing the radioactive materials. Jack's old boss and good friend shows them the cabin where he had really died and gave them the key. Inside the one-roo