Rovidia

Rovidia was the homeworld the Rovidians.

During the Last Great Time War, the Sontarans, seeking to use enter the conflict, found the prone Vassarian and his Battle TARDIS. Finding a way to engineer time technology from their prizes, the Sontarans moved their operation to Rovidia, conquering the planet, though they still faced native resistance.

After capturing the War Ollistra, the Sontarans reached out to the High Council and Dalek Empire to offer Ollistra as a prize, on the condition that the Sontarans would be allowed to join the Time War. When the Dalek Fleet arrived, they attempted an orbital bombardment of the planet but were held at bay by the temporal defences. General Fesk invited the Dalek Time Strategist to the surface, only to imprison the Dalek. When a Time Lord rescue party arrived, they were guided to the main complex by Kalan where the War Doctor helped Vassarian dissipate the artron energy he was generating. With the Sontaran defences down, the Daleks resumed their bombardment, increasing its intensity when the Strategist was rescued. The Time Lords escaped in Vassarian's TARDIS only for Heleyna to reveal herself as a Dalek spy, stalling the TARDIS in Rovidia's upper atmosphere and kicking the Doctor out. (AUDIO: The Eternity Cage)

After Ollistra managed to save the Doctor, Heleyna took the Lord Cardinal hostage and managed to reactivate the star chamber enough so that the TARDIS could enter the Time Vortex. The Dalek Fleet remained in orbit of Rovidia, fighting off its space defences, only to retreat when the Doctor thwarted their plan. The wreck of Vassarian's TARDIS crashed back on Rovidia where the Doctor desperately tried to get medical aid for Kalan only for Ollistra to inform him that the boy had perished. (AUDIO: The Eye of Harmony)