Jacked is the twelfth episode of the fifth season. It was released on 16 January 2009.
Charlie's rarely-exercised hacking skills are put to the test when the team tries to rescue hostages on a bus with a real-time deadline. Meanwhile, Alan chafes at his first experience with the think tank model.
The term can have two very different meanings, a contraction of 'hijacked', or 'psyched', 'pumped up', 'excited' etc.