Evelyn Yates

Doctor Evelyn Yates was a UNIT scientist stationed at a former UNIT Black Site. She was part of a team that monitored the Time Fracture in 2020.

Biography
On 17 August, Yates was observing the Time Fracture with Dr. Errol Courtney while Sergeant Robert Dudley made an update to the field log. (WC: 14681 UNIT Field Log)

On 18 August, Yates was monitoring the Time Fracture when Courtney updated the field log on a spike in Chronon and Arrton readings. When Yates tried to warn him the readings were increasing again, Courtney tried to dismiss them until the Time Fracture itself spiked out energy. (WC: 14682 UNIT Field Log)

On 19 August, Yates oversaw Dudley's mission to enter the Time Fracture, but was unable to do anything when he disappeared. (WC: 14683 UNIT Field Log) She and Courtney were unable to contact Dudley into the following day, but did receive a message from the Doctor, who gave them a list of people who could volunteer to enter the Time Fracture, codenamed Operation: Time Fracture. Using Jack Harkness's Vortex manipulator, Courtney and Yates were able to blueprint a machine for safer passage into the Time Fracture, and sent their logs to Kate Stewart. (WC: 14684 UNIT Field Log)

Behind the scenes

 * Based on the shared last name, she is likely intended to be related to Mike Yates, a UNIT captain who was a recurring character during a majority of the Third Doctor's era.