24: Day Zero (2007)

24: Day Zero is a series of online animated webisodes set at CTU in Los Angeles. It is a prequel series, focusing on Jack Bauer's first 18 months at CTU. The series is set before the action of Day 1, with Jack Bauer working at the Counter Terrorist Unit along with colleagues such as George Mason, Tony Almeida and Nina Myers, a mole unbeknownst to the rest of her colleagues. Furthermore, Jack's wife Teri is still alive. In the series Jack and Nina have been staking out a suspect, when they finally see a call to action.