Krontep

Krontep was a planet that was inhabited by a primitive people. The Warrior King of Krontep, Yrcanos, encountered the Sixth Doctor and Peri Brown on Thoros Beta. (TV: Mindwarp)

According to one account, Yrcanos and Peri later were married and she ruled beside him and attempted to bring education to the worlds ruled by Yrcanos. (PROSE: Bad Therapy)

According to another account, Peri's mind was controlled by a mind parasite called Mandrake and Yrcanos died seven days after their marriage, poisoned by Mandrake. The Doctor eventually helped Peri regain her own mind, and she left with him for further adventures. (AUDIO: The Widow's Assassin)

Dirk Slipstream claims to have earned a medal for bravery during the battle of Krontep. (PROSE: Night of the Humans)