This page lists categories of unnamed characters with spoken lines and/or credited actors seen on 24.
- civilians
- CTU agents
- FBI agents
- flight personnel
- government agents
- government officials
- law enforcement officers
- medical staff
- military personnel
- news reporters
- Secret Service agents
- security guards
- terrorists
- (deleted scenes characters)
All of the characters from the above links are rearranged to be cross-referenced by their Day or spin-off appearance within the galleries below.
- Unnamed Day 1 characters
- Unnamed Day 2 characters
- Unnamed Day 3 characters
- Unnamed Day 4 characters
- Unnamed Day 5 characters
- Unnamed Day 6 characters
- Unnamed Day 7 characters
- Unnamed Day 8 characters
- Unnamed Day 9 characters
- Unnamed Day 10 characters
- Unnamed Redemption characters
- Unnamed characters from The Rookie