Damon (Arc of Infinity)
From Tardis Wiki, the free Doctor Who reference
Damon was a technician for the High Council of the Time Lords who worked in their records section.
Biography
Damon provided the Doctor with proof that a member of the High Council had stolen his biodata extract, thus enabling Omega to carry out his plan to achieve physical existence once more. Damon helped the Doctor by reassembling the Heart of the TARDIS as Maxil had removed it. (DW: Arc of Infinity)