Kate Warner was the older sister of Marie Warner and daughter of Bob Warner. She aided Jack Bauer and CTU regarding the terrorist threat. Sometime after Day 2, she started a relationship with Jack.
Sarah Wynter was a series regular for Season 2 only, and appeared in all 24 episodes of that season. She was then a guest star in Day 3: 1:00 PM – 2:00 PM. She appeared in 25 episodes total.
- Her appearance in Day 3: 1:00 PM – 2:00 PM can only be seen in the extended version of the episode (original airing and on DVD). Her appearance is edited out in the 43-minute version of the episode.