Peri’s psychological trauma resurfacing and exploitation by Kamelion through familial imposture and memory manipulation

Peri collapses into Turlough's care, her illness taking hold as he tends to her in the borrowed room. While covering her, he notices an alien device hidden in her belongings …

As Peri sleeps on the TARDIS, her repressed guilt over her stepfather Howard surfaces in a sleep-talking confession, pleading for forgiveness and fearing abandonment. Kamelion seizes the opportunity to exploit …