Triad
From Tardis Wiki, the free Doctor Who reference
The Triad were the ruling authority of the Silurian people. One Triad, which included Icthar, Scibus, and Tarpok, freed their Sea Devil cousins and attempted to take over Sea Base 4. They intended to start a nuclear war which would wipe out humanity, but were defeated by the Doctor. (DW: Warriors of the Deep)
