Kate Orman

“Listen ... The universe is full of creatures that can get inside your soul. Things that try to take away the very things that make you who you are, who try to reshape you for their own ends, who want to eat you like a piece of fruit and spit out the seeds. It's Turtles all the way down. Are you listening? ... Listen, Chris. The Turtles don't deserve your life. You mustn't let them have you. I know them too well, Chris. They've touched me, infected me, possessed me. I've felt their contamination. I've been on their altars. Listen to me, Chris. They don't have the right ... Not even if they love you ... Not even if they're a god.”
― Kate Orman, Doctor Who: Sleepy

“The first time...' the Doctor said, snapping Chris out of his reverie, 'I don't remember, I was unconscious. The second time...I don't want to talk about.'

The third time?'

Unconscious.'

The fourth time?'

Atypical. There were some strange time and energy effects involved.'

But, you know, what does it feel like? Is it good or bad?'

Good,' said the Doctor, 'in the same way that driving a vehicle very, very fast is a good feeling, until pow!' He slapped his hands together suddenly. 'Like being shoved through a window. That's what it was like the fifth time.'

What about the sixth time?'

Unconscious.”
― Kate Orman, Doctor Who: The Room With No Doors