Once A Spy — Keith Thomson

When Charlie Clark takes a break from his latest losing streak at the track to bring home his Alzheimer's-addled father, Drummond, they're attacked by two mysterious shooters. At first, Charlie thinks his Russian "creditors" are employing aggressive collection tactics. But once Drummond effortlessly hot-wires a car, Charlie discovers that his father was a deep cover CIA agent ... and extremely sensitive information is rattling around his mind. Now the CIA wants to "contain" him, so the two embark on a wild chase through the labyrinthine world of national security that will force them to confront unspeakable danger, dark conspiracies, and what it means to be a father and son.