“I’m getting sick of being your passenger all the time!”
Turlough knew how it sounded. When they first met, he’d been sent to kill the Doctor. He’d hidden his species, his planet of origin, his past, even his full name from everyone and from the Doctor most of all. Turlough was no stranger to deception.
But the Doctor keeping him in the dark now rankled. How could he help if he didn’t know what was going on? Maybe that was the point? After all this time, the Doctor still didn’t trust him. So why did the Doctor let him stay?