"Wake up, Dad. You gotta see this!"
Rubbing his eyes, Sam tried to remember what had happened. He'd been in the Arizona desert in 1959, but he realised that he'd materialised in 1992, more than thirty years later. And he'd just had a great night's sleep.
But now David, the son of the man he'd just leaped into, was waking him vigorously from his dream. Sam was quite shaken by this. "Hey, calm down! What's the matter?"
"You have to see this. It was on 'Paranormal Tonight'! I taped it. Come and look!"
Sam walked reluctantly down the stairs as the young man led him to the VCR. Pushing the tape in and turning on the television set, Sam saw amateur footage of what seemed to be an alien spaceship lifting off from a back alley. The narrator on the programme seemed totally convinced by the validity of the footage.
David looked at his impromptu father. "Hey, Dad, is that cool or what?"
Sam kept watching the footage. In a small corner of the screen, he saw what looked like an antique police phone box fade from view. Nowhere near as impressive as the ship overhead, but far more meaningful to Sam.
David refused to shut up. "So, Dad, what do you think?"
Sam just smiled. "Go get 'em, pal".