What I've never understood was the underlying premise behind the first movie.

SPOILER ALERT for Bourne Identity!

After all, if not for the hidden flash device in his thigh, Jason Bourne might still be a Mediterranean fisher to this day. That was his only clue, from which he finds the gun and the passports and the money, etc.

Okay, so agent Bourne has a safety deposit box with his secret stash. No problem. He's about to go on a mission, but FIRST, he wants to make extra certain that he doesn't accidentally get shot in the back, fall into the ocean, and develop amnesia. So he implants the device in his thigh so that in case he gets shot in the back, falls in the ocean, and develops amnesia, he can still find his spending money.

First problem: Who in the world comes up with a contingency plan in case he gets amnesia? What was his contingency plan in case he was framed for a murder he didn't commit by his unknown evil twin brother? How about if aliens land on the White House lawn? What about if an asteroid the size of Texas is heading for Earth, what then?

Second problem: If you are leaving yourself a clue to your true purpose in life in case you get shot in the back, fall into the ocean, and develop amnesia, why can't you just include in the safe deposit box an envelope labeled, "In case of Amnesia, read this first!" Inside the envelope is a note written to yourself: "Your name is Jason Bourne, which is a code name, you are a trained killer for the CIA. Your boss's name is X and his address is di dah di dah."

Is this gaping plot hole closed up in the books?