- "We've lost General Kenobi's trail, sir, as well as contact with Prowlers numbered one through fourteen. Permission to deploy our final batch?"
During the last year of the Clone Wars, CT-307 was sent to the planet of Utapau, where he would assist Jedi General Obi-Wan Kenobi and Commander Cody in their fight against the Separatists and General Grievous. After the battle, the trooper, along with the rest of the battalion, received Contingency Order 66. They opened fire on Kenobi.
After the Jedi seemingly disappeared, the clone troopers sent Prowler seeker droids out to look for him. CT-307 was placed in charge of the status of the droids, noting that Prowlers 1–14 went out of commission. The trooper reported this to Cody and requested the deployment of the rest of the droids, but the Jedi managed to escape.
- The New Essential Guide to Droids