Look in the reflection of the back of Tony's car when he, Jack, and Audrey arrive at his house
When Sarah denied being the mole inside CTU, instead of torturing her,Erin Driscoll should've thought of using a polygraph to determine if Sarah was lying.
While Jack is at Tony's house, he calls for backup and gives the address 21408 Kipling in North Hollywood. However, when the Secret Service arrives, the number on the house is 21048.
Marianne Taylor says once she's discovered as the mole in CTU, she doesn't want to spend the rest of her life in jail, for treason she would be sent to prison, not jail, even possibly be given the death penalty.