|Affiliation:||Counter Terrorist Unit|
|Profession:||Field agent, CTU Los Angeles|
|Death cause:||Killed by Jovan Myovic|
|Died:||Day 1: 5:55pm|
|Played by:||Anthony Richardson|
|Episode:||"Day 1: 5:00pm-6:00pm"|
- For others with the same name, see Williams.
Williams was a CTU field agent active during Day 1.
Agent Williams was sent by Tony Almeida to investigate the Bauer residence and check if Teri or Kim Bauer turned up there. The assassin Jovan Myovic also went to the Bauer home after he lost sight of the two women. Myovic arrived at the house first, and killed Williams soon after he appeared. Teri arrived with Phil Parslow after this.