On 14 October 1914, Abberton was at the Forge, experimenting on humans with a vampire virus. The vampires overpowered their creator and escaped. Abberton was mortally wounded and took the drastic step of using the Twilight formula to save his life, becoming a vampire. (AUDIO: No Man's Land, Project: Twilight) Abberton took the codename Nimrod and, enhanced with cybernetics and specialised weaponry, sought to hunt the vampires down and destroy them. During this time he met the Sixth Doctor and Evelyn Smythe, who stopped him from killing the vampire Cassandra Schofield. (AUDIO: Project: Twilight)