"24" Episode 17 Mystery Cache

The following takes place between 4pm and 5pm

Jack discovers Kathy just in time. Kathy tells Jack “I overheard my mother in a conversation with a man named Kabul.” Jack replies “We know all about him already just relax for now”. she continues “What is important is when she said goodbye to this man she used the name SHADOW.” Jack perked up “Are you sure?” “Yes” she said “I’m positive because she told him she would meet him later tonight to exchange something, I distinctly remember the name”. This was Jacks' first real lead and he didn’t want to blow it. If Sherry was planning to meet Shadow then she was going to keep that appointment…. “What time was she meeting him?” Jack asked. “I’m not sure they talked in code but I remember what she used” Kathy wrote down the following code: 12, 23, 35, 47, 511, 613, 717, ___