You don't see what Jack is doing all the time. So obviously he's peeing then. Why don't they show it? Because that's when we are watching more interesting stuff.
2. He never sleeps.
Staying up for 24 hours straight is not that hard, especially when you're trying to save the world and being shot at and beaten up constantly.
3. They all travel and get intel way too fast.
True.
4. Its almost all impossible.
Welcome to TV.
5. Things don't work that way.
Welcome to TV.
6. Things really dont work that way.
Welcome to TV.
7. He would be dead. Or at least in a coma, or fast asleep.
