Bom-borradoh
From Tardis Wiki, the free Doctor Who reference
The Bom-borradohs were a species known to the Eleventh Doctor. They were capable of creating ring-like portals, allowing people to travel through both space and time. The Doctor used their help to get into the Tomb of the Bear, then escape, travelling from 1934 to the 21st century. (WC: Snowfall)
