Dr. Catherine Halsey is the Head of AI research on the planet Reach and also oversees an unknown military program. She is also the on/off girlfriend of Rushy Mudd.
Dr. Halsey's first appereance was on May 15th, 2012 where she was seen to be previously acquainted with Tim. She was introduced to Rushy by Tim on May 16th. The character temporarily brought some logic into the series and was later used to introduce some romance into the series. This was soon discontinued, though is occasionally referenced.
Dr. Halsey remains as a recurring character. Due to the erratic nature of the series, her condition is unknown.