For the Love of Larry

Plot
Jonathan and Mark are constantly being hounded by a stray dog, whom it turns out is the spirit of the deceased dog of a father and son whose vehicle went careening down an embankment due to a blown tire while driving to a vacation spot and are out of sight of any searchers.

Episode Details
The dog also displays certain powers, such as knowing when things are going to happen. He saves Mark from being smashed by big truck that crashes right through the diner wall he was sitting by. He also fights and kills a rabid dog that was attacking a little boy.