Crypt of Primo

The Crypt of Primo was a location within the Tower of Selsor in the Nomed Zone on the planet Belstar. It was where the Siros had entombed the blue rock, a kind of storage device that the Sixth Doctor and Peri Brown needed to retrieve for the Siros' enemies, the Debans, in order to free the TARDIS from the Galactic Co-ordinator Intercept. (PROSE: Battle Planet)