The first transfer is flawed, so Dr. Crozier needs to transfer Lord Kiv into another host body. Unfortunately, Peri meets all the requirements for the subsequent candidate. Since the Doctor's been helpful and has somewhat of a personal interest in Peri, he's permitted to locate an equally suitable substitute candidate, if he can. The prosecution rests.
Did You Know?
In The Fifth Doctor story "Planet of Fire", Turlough saves Peri from drowning when she tries to swim to shore. In this story, The 6th Doctor and Peri arrive on Thoros Beta, which is a watery planet. See more
I must attend this meeting, otherwise we could all finish up POOR. Now what is more important - my well-being or your wealth?
Heh-heh-heh. A trick question, Magnificence; but, if you're fit enough to cope, who am I to contradict?