This page is about Catherine Thomas, the original TOMCAT. For her sibling, Julian Thomas, the hacker starring in 2064: Read Only Memories, see TOMCAT.

Catherine Thomas was the older sister of TOMCAT, and the original bearer of the name. She was responsible for the breach in Parallax' servers in 2054, but walked free after her sibling took the fall. During their imprisonment, she died in a rare auto-cab accident.