Pik Solus

 was a Terradon. He returned to Alzarius to search for Marshmen. He questioned the Fifth Doctor and Tegan Jovanka who knew of their past. He caused the explosion that destroyed some of his ship. He order Drell to kill Yan Fara. He wanted to destroy Decider Lana Merrion for killing a lot of Higari by diverting a tidal way, and his sister. He tried to kill Nyssa and Vislor Turlough by placing riverfruit containing Alzarian spiders with them. Even after hearing the truth, he still wanted to kill them all. (AUDIO: Mistfall)