Thoros-Alpha
From Tardis Wiki, the free Doctor Who reference
Thoros Alpha was the home world of the Thoros-Alphans and twin planet to Thoros-Beta. It had a prominent ring system and it was visible from its twin planet.
It was the home world of the Mentors, who took many Thoros Alphans as slaves. The Thoros Alphans were able to form a resistance. (TV: Mindwarp)
